Indonesia Conference Directory

Corresponding Author
Afrida Hafizhatul Ulum

Institutions
a) Instrumentation and Computational Physics, Department of Physics, Institut Teknologi Bandung, Indonesia
*afridahafizhatululum[at]gmail.com
b) National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand

Abstract
Surface enhanced Raman scattering substrate was an alternative analytical tool with ultrahigh sensitivity and rapid response for chemistry, medicine and forensics science. In this work, the surface enhanced Raman scattering (SERS) substrate based on PDMS grating structure created by laser interference lithography using excimer laser modification and further 80 nm-thick Au thin film deposition by dc magnetron sputtering was proposed. We investigated the effect of the grating depth on SERS performance. The methylene blue solution of different concentration was employed to test the SERS performance using the portable Raman spectrometer. The optimal SERS performance can be optimized by fabricating the PDMS grating structure with 850 nm-period, 310 nm-depth and 0.5-filling factor

Keywords
SERS, laser interference lithography, magnetron sputtering, PDMS grating

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/6aUDCfP2cQGR

Corresponding Author
Sudipta Saha

Institutions
(a) Kyungpook National University, Daegu, South Korea

*Corresponding Author: hongjoo[at]knu.ac.kr

Abstract
For the purpose of neutron imaging, scintillation crystals composed of Li, B or Gd, which have very high thermal neutron absorption coefficients are becoming popular. These crystals can provide distinct luminescence properties with different rare earths dopants (Ce3+, Dy3+, Eu3+ etc.). In the present work, Li6Y(BO3)3 (LYBO) pure and doped with 4 mol% Dy3+ single crystals have been grown using the Czochralski method. X-ray induced luminescence properties have been studied for both pure and doped crystal at room temperature. Thermoluminescence properties of both pure and 4 mol% Dy3+ doped LYBO crystals have been evaluated at low temperature from 10 K to 320 K and at high temperature from 326 K to 670 K separately. Photoluminescence, decay time and beta scintillation counts have been measured in low temperature from 290 K to 10 K for 4 mol% Dy3+ doped LYBO crystal. Characteristic emission of Dy3+ ion has been observed for LYBO crystal doped with 4 mol% Dy3+ under X-ray irradiation. The maximum intensity of excitation and emission peaks are found at 350 nm and 578 nm, respectively. Decay time decreases from 690 μm at 290 K to 655 μm at 10 K. Thermoluminescence emission of both pure and doped crystal is similar at low temperature but differs at high temperature. Scintillation beta counts has also been decreased while measuring from 320 K to 10 K. In future, the crystal will be tested as a thermal neutron scintillator for imaging.

Keywords
Crystal, Luminescence, Scintillation, Decay time

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/rQwm9DkYCUua

Corresponding Author
Pham Hong Minh Pham

Institutions
1Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
2Institute of Laser Engineering, Osaka University, Suita Osaka 565-0871 Japan
3Centre for Theoretical Chemistry and Physics, School of Natural and Computational Sciences, Massey University, Albany, Auckland 0632, New Zealand

Abstract
We report the successful development of an all-solid state laser based on a Czochralski method-grown cerium-doped lithium calcium aluminum fluoride (Ce3+:LiCaAlF6) crystal as the gain medium. Results for the broadband, narrow linewidth and short pulse laser emission are obtained by pumping with 7 ns pulses at 266 nm from the fourth harmonics of a Nd:YAG laser operating at 10 Hz repetition rate. The effects of output coupler reflectivitiy, resonator length and pump energy on the laser pulse duration were explored. With broadband configuration, a maximum output pulse energy of a few mJ was achieved. Sub-nanosecond UV laser pulses were generated from a low-Q and short resonator under near threshold pump energy. By replacing the end mirror with a grating, tunability from 281 nm to 299 nm with linewidth of about 0.2 nm is achieved. For high power ultrashort ultraviolet laser development, we have investigated the prospects of using a diamond-cut Ce:LiCAF crystal in a two-side-pumping configuration, and performed calculations on the optimum geometry, size, and absorption coefficient that will serve as a guideline when developing a UV laser oscillator and femtosecond amplifier. Results show that there is a trade-off between homogeneity and absorption ratio for absorption coefficients greater than 1.5 cm−1. Moreover, a larger crystal with lower doping concentration would be more homogeneous and would have a higher absorption ratio, regardless of geometry. Our results suggest the possibility of developing an all-solid-state ultraviolet laser operating at TW level by appropriately designing the amplifier crystal in conjunction with a multiple-beam side-pumping configuration.

Keywords
ultraviolet laser; short pulse laser; tunable laser; narrow linewidth laser; transient resonator; rare earth-doped fluoride

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/2JBUYvudpwKy

Corresponding Author
Nakarin Sinkiburin

Institutions
Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, 73000,Thailand

Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Industrial Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, 73000, Thailand

Abstract
In this paper, studied the refining effects of Sb2O3 and ultraviolet transmitting property of NaCaBSi glasses. These raw materials were weighted according to the (40-x)SiO2 :30B2O3 :20Na2O :10CaO :xSb2O3 where x=0.0, 0.05, 0.1, 0.5, 1.0 and 2.0 mol%. NaCaBSi glasses were obtained by using melt quenching technique and characterized by using density, refractive index, optical absorption spectra and the number of bubbles in glass measure as a function of different concentrations. The density (ρ), molar volume (VM) and refractive index obtained were found to increase with increases in the concentration of Sb2O3 in the glass matrix. The optical absorption spectra of glasses were measured in the wavelength of 200 – 1,100 nm. Number of bubbles in glass decrease when increasing Sb2O3 concentrations

Keywords
Sb2O3, NaCaBSi glasses, bubbles in glass, refining, molar volume

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/aGmFxBjWNwCL

Corresponding Author
Sunantasak Ravangvong

Institutions
Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University Nakhon Pathom, 73000, Thailand

Abstract
Sodium gadolinium phosphate oxide and sodium gadolinium oxyfluoride glasses doped with europium oxide were prepared by melt-quenching technique. The physical, optical properties of the glass samples were studied. The density, molar volume and refractive index of the glass samples were carried out. Density and molar volume of oxide glass is more than oxyfluoride glass. The average phosphate to phosphate distance for oxide glass seems to be more than oxyfluoride glass. Polaron radius, inter-ionic radius shows 1.181 nm, 2.88 nm and 1.174 nm, 2.86 nm for oxide glass and oxyfluoride glasses respectively. Oxide electronic Polarizability and optical basicity of the oxide glass are lower than oxy-fluoride glass. Theoretical optical basicity shows higher for oxide glass than oxyfluoride suggesting increase in covalency of the cation to oxygen bonds in oxide glass. Optical band gap were estimated and found to be 3.061eV and 3.204 eV for oxide and oxyfluoride glass. Theoretical two photon absorption coefficient β were evaluated and found to be 11.96 and 10.80 for oxide and oxyfluoride glasses respectively. Furthermore, the glasses were subjected to study for their luminescence properties of the oxide and oxyfluoride glass samples.

Keywords
Europium, Oxyfluoride, Tauc plot, Phosphate glass

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/KwPdv9hZt6LC

Corresponding Author
NISAKORN SANGWANATEE

Institutions
Informatics Mathematics, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand

Abstract
Sodium aluminium barium phosphate glasses doped with different concentration of Pr2O3 were synthesized by melt quench technique. These glasses were varied concentrations of Pr2O3 at 0, 0.05, 0.10, 0.50, 1.00 and 2.00 mol%. Their physical properties like density () and refractive index (n) were measured at room temperature. Also, optical absorption and photoluminescence spectra of these glasses have been acquired at room temperature. It was found that the intensity were increase with increasing concentration of Pr2O3. UV-Vis and NIR (250-2500 nm) spectra have been measured for all studied glass samples and discussed. The photoluminescence spectra recorded under 445 nm excitation exhibited the emission bands at 528, 598 and 639 nm corresponding to the emission transitions 3P1 → 3H5, 1D2 → 3H4, and 3P0 → 3F2 respectively. The Judd-Ofelt (JO) parameters Ωλ (λ = 2, 4 and 6) have been calculated to explore the bonding environment around the Pr3+ ions. The CIE chromacity color coordinates (x,y) are calculated from the emission spectra which indicates the located in the yellow-orange region. The prepared glasses are potential candidates for laser applications.

Keywords
optical properties, Luminescence

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/gnXaCzvJ7dA2

Corresponding Author
NARONG SANGWANATEE

Institutions
1Electronics Technology, Faculty of Science, Ramkhamhaeng University, Huamark Bangkapi Bangkok Thailand. 10240
2Department of Electronics, Faculty of Engineering, King Mongkut-s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
3Applied Physics Research Group, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand

Abstract
In this paper will present the properties of PN diode before and after expose by radiation. Although, radiation help to improve the performance of semiconductor device but still has some damage in device structure. In previous article I have showed performance improve after expose by soft radiation. The device is exposed by X-ray radiation with few second for several times. In principle of PN diode after fabrication will has defects from process such as ion implantation, doping and silicon wafer process. The results show temperature while X-ray expose on device that generate high temperature on surface and silicon boundary that may the optimize energy and expose time for treatment damage of PN diode.

Keywords
X-ray ; PN Diode

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/FUzn9BE67hex

Corresponding Author
Fatimah Arofiati Noor

Institutions
Department of Physics, Physics of Electronic Materials Research Division,
Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung,
Jalan Ganesa 10, Bandung 40132, Indonesia
*Email: fatimah[at]fi.itb.ac.id

Abstract
In this study, the spin-polarized currents in a magnetic tunnel junction (MTJ) with a Fe/GaAs/Fe structure were calculated by considering the Dresselhaus effect. First, the transmittance was calculated using the Airy wave function approach, where it was found that the electron transmittance for each spin state is different and the incident angle affects electron transmittance and electron polarization. It was further shown that electron polarization is also affected by the electron energy and the barrier width, and that the electron transmittance is quasi-symmetric to the incident angle. The obtained transmittances were subsequently used to calculate the spin-polarized current in the MTJ, where it was found that the current density for both spin states increases with the addition of external voltage. It was also shown that the current density increases as the barrier width decreases. In addition, the temperature and the incident angle of the electrons affect the current density, where the maximum current density is obtained when the electrons come in a direction perpendicular to the barrier. We herein determined analytically that a high device performance of the MTJ could be achieved by simply controlling the device parameters of barrier width, temperature and incident angle of the electron.

Keywords
Dresselhaus term, Magnetic tunnel junction, Spin-polarized current, Transmittance, Zinc blende material

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/3t2XTu9prC7M

Corresponding Author
Yaowalak Yamsuk

Institutions
Nakhon Pathom Rajabhat University, Thailand

Abstract
The tellurite glasses doped with Nd3+ ion were prepared with the compositions (55-x)TeO2-10ZnF2-35BaO-xNd2O3 (where x = 0.00, 0.05, 0.10, 0.50 1.00 and 1.50 mol%) by the normal melt quenching technique and characterized the spectroscopic properties. The spectroscopic properties of tellurite glasses measured from the absorption and emission measurements with Judd-Ofelt analysis. The X-ray diffraction (XRD) pattern confirms the amorphous nature. UV-Vis-NIR absorption spectra of tellurite glasses divulged nine significant peaks. The absorption peaks slightly increase with increasing of Nd3+ concentration. The NIR emission spectra at 1069, 1341 nm have been registered for Nd3+ in tellurite glasses, which corresponds to the transitions originating from 4F3/2 level to the 4I11/2 and 4I13/2 levels of Nd3+ ion, respectively, under the excitation of 523 nm. The results indicate that the prepared glass system could be a suitable candidate for using it as laser gain media around 1069 nm.

Keywords
tellurite glasses, Nd3+ ion, Judd-Ofelt analysis

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/qbMAyTm26zGB

Corresponding Author
Kohei YAMANOI

Institutions
Institute of Laser Engineering, Osaka University

Abstract
For decades, nuclear fusion has been studied in key research institutions all over the world. Understanding the dynamics of the imploded fusion-plasma is a key issue in inertial confinement fusion (ICF) experiments. Scattered-neutron diagnostics is one of the most desirable methods in studying the fuel aerial density of the imploded plasma.　In this method, a sufficiently fast-response neutron scintillator is necessary for time-of-flight measurement. We report the optical properties of rare-earth (RE) -doped APLF [20Al(PO3)3-80LiF] glasses as fast-response scintillators. The optical properties were characterized using photoluminescence and photoluminescence excitation of the Pr3+- and Ce3+-doped APLF glass samples for doping concentrations ranging from 0.1 to 3.0 mol%. The APLF glass doped with Pr3+ revealed rich emission bands under 180, 217, and 430-440 nm excitations. The broad emission from 228 to 371 nm for both excitations were assigned to the interconfigurational 4f5d and intraconfigurational 4f transitions of Pr3+ ions. The intensity of the emission peaks was observed to increase as a result of increasing Pr3+ concentration. In contrast, the APLF glass doped with Ce3+ exhibited intense emission at 340 nm under 240 to 400 nm excitation which originated from the 4f5d transition of Ce3+ ions. There was no fluorescence from 4f transitions, but the strong emission peak at 340 nm was shifted to shorter wavelengths with decreasing Ce3+ concentration. The decay times of APLF80+Pr3+ were constant at different temperatures from 0K to 300K and became faster with increased doping concentration from 19 ns (0.5% Pr3+) to 16 ns (3.0% Pr3+). The decay times of APLF80+Ce3+ glasses were the same in the range from 38 to 41 ns regardless of Ce concentration. These results highlight that the scintillation decay times from both Pr3+- and Ce3+-doped APLF glasses are significantly faster than conventional glass scintillators and therefore an advantage for fast-response scintillator applications.

Keywords
scintillator; glass materials

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/K8BqcAVzQ9vT

Corresponding Author
Afrida Hafizhatul Ulum

Institutions
a) Instrumentation and Computational Physics, Department of Physics, Institut Teknologi Bandung, Indonesia
*afridahafizhatul[at]gmail.com
b) National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand

Abstract
Here, we report an efficient approach to optimize the performance of surface enhanced Raman scattering (SERS) substrate. The geometry of the SERS substrate consists of the Au film deposited on polymer grating. Firstly, an optimized value of grating geometries and Au thickness has been performed by rigorous-coupled wave analysis (RCWA).The SERS substrate were fabricated by the laser interference lithography (LIL) and magnetron sputtering of Au thin films. The effect of the Au thin film prepared by magnetron sputtering at different deposition time (5-180 s) and operated pressure (3-5 mTorr) on the SERS performance were investigated and compared with the RCWA simulation results. The morphology of the obtained samples was observed by field-emission scanning electron microscopy (FE-SEM). The results indicated that optimal SERS substrate with deposition time of 180 s and 3 mTorr-operated pressure was obtained. The limit of detection for methylene blue (MB) and methyl parathinon were evaluated at 10^(-4) M and 10^(-2) M, respectively. Moreover, our SERS substrate shows the application of a portable Raman spectrophotometer which also promising for on-site pesticide substance detection.

Keywords
SERS, Au film, RCWA, laser interference lithography, Pesticide

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/4Mgq7bkrwDzx

Corresponding Author
Lia Yuliantini

Institutions
1Department of Physics, Institut Teknologi Bandung, Jl. Ganesa No. 10 40132, Indonesia
2Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand
3Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand
yuliantini.lia[at]gmail.com

Abstract
We developed Sm3+ ion-doped fluoroborotellurite glass using melt and quenching technique. The glass formula is (30-x)TeO2-30B2O3-10ZnF2-30BaO-xSm2O3 where x = 0.0, 0.05, 0.1, 0.5, 1.0, and 1.5 mol%. The raw material is melted at 1150 0C for 1.5 hours and annealed at 500 0C for 1.5 hours. All glass samples are cut and polished around 1.5 x 1.0 x 0.35 cm3. Several properties such as physical, optical, photoluminescence and radiative are inspected to understand the Sm3+ ion in the glass matrix. The absorption spectra are observed in the infrared region and show strong absorption peaks at 1232 nm due to 6H5/2→6F7/2 transition. Meanwhile, the photoluminecence properties show the glass sample excessively emits 600 nm under λex=403 nm due to 4G5/2→6H7/2 transition. The CIE 1931 coordinate confirms the orange emission colour of the present glass. The radiative properties of glass sample in the 4G5/2→6H7/2 transition are investigated using Judd-Ofelt theory and shows high potential lasing parameters such as large stimulated emission cross section (σe = 2.04 x 10-21 cm2), high branching ratio (βcal = 0.62), and high quantum efficiency (η = 81%). From all results, we conclude that our glass sample can be developed as a light source of orange LED and laser application.

Keywords
Borotellurite glass, LED, and Sm3+

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/b8g7zpQ9enHr

Corresponding Author
Nawarut Jarucha

Institutions
Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Abstract
The gadolinium tungsten borate glasses doped with Er3+ were prepared by melt quenching technique for study in physical, absorption and luminescence properties by composition (30-x) B2O3 - 27.5 Gd2O3 - 42.5 WO3 - x Er2O3, where x = 0.1, 0.5, 1.0 and 2.0 mol%. The results show that doping Er2O3 in high concentration make the glass density and molar volume tend to increase. The absorption spectra indicate the photon absorbing of Er3+ in visible light and near infrared region. The luminescence of an erbium doped glass were investigated at room temperature. In addition, mechanisms of the luminescence by multiphoton absorption and energy transfer processes are discussed based on the energy-level diagram of Er3+ and luminescence spectra. These results benefit for efficient short and conventional-length optical amplifiers and tunable lasers.

Keywords
Borate glass, Erbium, Luminescence

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/hGtVm8BrNyA3

Corresponding Author
Nursaida Harahap

Institutions
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan

Abstract
Abstract: Glasses treated with soil ions are very interesting because of their wide application in fields such as laser and optical fibers. Various hosts such as glass, crystal and poly crystalline are treated with soil ions. In this research the medium of glass was made with composition (70-x) P2O5 - 10Bi2O3 - 10Na2O - 10Gd2O3 - xSm2O3 with x = 0; 0.05; 0,1; 0, 5; 1.0; 3.0 (mol%) doped by active ion xSm2O3. All powdered chemical compounds with a total mass of 20 grams are mixed in alumina crucible and prepared by melt-quenching method. The optimum glass sample is cut to size (w x h x d = 1,0 x 0,2 x 1,5) mm3. Molar mass, density (ρ), Sm3+ ion concentration (N), field strength (F) have increased in value as the Sm3+ concentration increases , the dielectric constant (ε) has an increase in pada PBNaG:S1, PBNaG:S3 dan menurun pada PBNaG:S2, PBNaG:S4, PBNaG:S5, molar refractivity (Rm) increases in PBNaG:S1, PBNaG:S4 and decreases in PBNaG:S2, PBNaG:S3, PBNaG:S5, while for molar volume, polar radius and inter nuclear distance decreases with increasing concentration Sm3+ in phosphate glass. Contrast to the refractive index, the susceptibility of the oxide ion polariability (αm) and reflection loss do not change in value. Spectrum diffraction shows that the shape of pattems are found no sharp peaks along the diffraction angle observation area (2θ). It can be stated that the glass material Sm3+: Phosphate is amorphous (no sharp peaks). This shows that the concentration of Sm3+ ions does not affect the diffraction pattern of Sm: Phosphate glass medium. The highest FTIR spectrum is archieved at PBNaG: Sm5 with wave number 871 cm-1. There is a functional group P-O-P (POP) bond indicating asymmetrical strain.

Keywords
Glasses, Phosphate, Samarium, PBNaG:Sm3+

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/4Gp9XBQm7F2g

Corresponding Author
Rahmaniar .

Institutions
Universitas Negeri Medan

Abstract
The medium glass was made from chemical compounds with a composition (70-x) P2O5 - 10Bi2O3 - 10Na2O - 10Gd2O3 - xDy2O3 (where x = 0; 0.05; 0.1; 0, 5; 1.0; 3.0 (mol%)) which is doped by active ion xDy2O3. All of propofed chemical compounds are in the form of powder with a mass of 20 gram of mixture in an alumina crucible and prepared by melt-quenching method. The glass that has been obtained with a size (3x10x10) mm3 and smoothed to get a flat surface and high transparency. The physical properties obtained from the glass medium are density, molar volume, refractive index, ion concentration Dy:PBiNaGd, molar refractivity and susceptibility. The results of research indicated that the glass of Dy:PBiNaGd amorphous. This amorphous nature is confirmed by spectroscopy diffraction of X-ray (XRD). Measurement of FTIR spectra to glass Dy:PBiNaGd shows the asymmetry strain in the P-O-P (POP) bond at an area of 861 cm-1 absorption.

Keywords
Glass Phosphate, Dysprosium and optical properties

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/AKyTfHXFZ3Ua

Corresponding Author
Pabitra Aryal

Institutions
(a) Department of Physics, Kyungpook National University, Daegu 41566, Korea
(b) School of Liberal Arts, Semyung University, Jechon 27136, Korea

Abstract
Commercial silver-doped phosphate glass is a promising solid-state radio-photoluminescent (RPL) dosimeter. It has several promising characteristics as RPL intensity linearity with the ionizing irradiation dose, data accumulation, no fading, and measurement repeatability. It can be used as personal, environmental, and clinical dosimeters as well. The objective of this study was to synthesize silver-doped phosphate glass at laboratory and optimize the Ag+ concentration. The absorption, emission and excitation properties of the prepared glass was measured before and after proton and X-ray irradiations. Yellow emission peak at 600 nm and excitation peak at 320 nm was measured after X-ray, proton and beta irradiation. Radiative lifetime of the glass had two decay components for yellow RPL. A more comprehensive study on Ag+ concentration optimization is under study to investigate optimum RPL properties of the silver-doped phosphate glass.

Keywords
Dosimeter, Radiative lifetime, Radio-photoluminescence, X-ray irradiation

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/yjpN2WLEeUux

Corresponding Author
Juniastel Rajagukguk

Institutions
1Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia
3Department of Physics, Faculty of Mathematics and Natural Science, Universitas Padjadjaran
4,5Center of Excellence in Glass Technology and Materials Science, Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand

Abstract
Glasses treated with rare earth are very interesting because of their wide application in fields such as laser and optical fibers. Various hosts such as glass, crystal and poly crystalline are treated with soil ions. In this research the medium of glass was made with composition (70-x) P2O5 - 10Bi2O3 - 10Na2O - 10Gd2O3 - xSm2O3 with x = 0; 0.05; 0,1; 0, 5; 1.0; 3.0 (mol%) doped by active ion xSm2O3 All powdered chemical compounds with a total mass of 20 grams are mixed in alumina crucible and prepared by melt-quenching method. The optimum glass sample is cut to size (w x h x d = 1,0 x 0,2 x 1,5) mm3. Physical properties such as density, molar volume, refractive index, Sm3+ ion concentration, molar reactivity and susceptibility for each doping concentration are calculated and reported. The optical properties of glass samples Sm3+ with different concentrations were determined by measuring the absorption and luminance spectrum in the visible region. UV-Vis NIR spectrophotometer analysis showed that there were nine non-homogeneous transition bands in various positions and intensity with hypersensitive transitions at 1233 nm (6H5/2-6F1/2) wavelength. Emission spectrum in glass medium Sm: Phosphate was observed using an excitation wavelength of 550 nm resulting in four emission band transitions namely 4G5/2/6H5/2 (562 nm), 4G5/2/6H7/2 (597 nm), 4G5/2/6H9/2 (644 nm) and 4G5/2/6H11/2 (703 nm), Emission intensity increases at Sm 1.0 mol%.

Keywords
Glass, phosphate, samarium, PBNaG : Sm

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/3VrGdbzpPkYt

Corresponding Author
Eka Sylvianti Rahayu

Institutions
(a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
*ekarukmanaeka[at]gmail.com
(b) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand
(c) Physics Study Program, Department of Science, Insititut Teknologi Sumatera, Lampung, 35365, Indonesia
(d) Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabat University, Nakhon Pathom, 73000, Thailand

Abstract
In this work, multi wall carbon nanotube (MWCNT) doped borate glass has been successfully developed by melt quenching technique with the chemical composition 67.5B2O3-20ZnO-12Gd2O3-Er2O3-0.5MWCNT. Several peaks observed from absorption spectra due to transition from 4I15/2 as a ground state into several states i.e. 4G11/2, 4F7/2, 4F5/2, 2H11/2, 4F9/2, 4I11/2, and 4I13/2. The sample shows a strong emission in 1536 nm because of 4I13/2→4I15/2 transition under 524 nm wavelength excitation. Emission around 412 nm under 275 excitation could be the indication for presence of MWCNT. The sample exhibits NIR to NIR up-conversion under 1500 nm excitation. Absorption data have been used to calculate optical band gap energy through Tauc plot method. This study shows that MWCNT doped borate glass could be a promising material for solid state application in NIR region.

Keywords
borate glass, luminescence, MWCNT, erbium, NIR to NIR up-conversion, Tauc plot

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/RD8VGET4npJx

Corresponding Author
NARONG SANGWANATEE

Institutions
1Applied Physics Research Group, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand
2Department of Electronics, Faculty of Engineering, King Mongkut-s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
3Electronics Technology, Faculty of Science, Ramkhamhaeng University, Huamark Bangkapi Bangkok Thailand. 10240

Abstract
In this study present the effect of Flash radiation to forward bias current-voltage (I-V) of PN diode by using Comsol simulation program. The results show surface thermal and electric change while expose by radiation with flash exposure technique. Series resistance (Rs) increase around 2 times and close to idea case after expose by radiation, the radiation will impact to bulk defect and reduce surface recombination. Radiation induce temperature on surface and deep into silicon bulk. The value of Rs increase with increase expose time. The changing of Rs becomes independent from radiation dose at high forward bias voltage.

Keywords
PN Diode ;Soft Radiation

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/awjXz8qUCPMT

Corresponding Author
NARONG SANGWANATEE

Institutions
Applied Physics, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand

Abstract
Nd3+ ion doped lithium aluminium phosphate glasses were synthesized and studied their properties for laser medium application. The density and the refractive index of the glass samples were carried out at the room temperature. The optical and luminescence properties were studied by investigating absorption and NIR emission spectra of the glass samples. The glasses absorbed photons in ultraviolet (UV), visible light (VIS) and near-infrared (NIR) regions are clearly observed from absorption spectra. For the photoluminescence properties, the glass samples showed the strongest emission at 1063 nm when it were excited by 581 nm which assigned to the energy transitions of Nd3+. The three phenomenological Judd-Ofelt parameters (Ω2, Ω4, Ω6) were determined from the spectral intensities of absorption band in order to calculate the radiative transition possibility (AR), stimulated emission cross section (σ(p)) and branching ratio (R) of the 4F3/2  4I9/2, 4I11/2 and 4I13/2 transitions. From the obtained results the conclusions made about the possibility of using these glasses as laser material.

Keywords
luminescence ,aluminium phosphate

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/b2hf4vwGkgym

Corresponding Author

Institutions
1Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia
2Department of Physics, Faculty of Mathematics and Natural Sciences, Padjajaran University

Abstract
The medium glass was made from chemical compounds with a composition (70-x) P2O5 - 10Bi2O3 - 10Na2O - 10Gd2O3 - xDy2O3 (where x = 0; 0.05; 0.1; 0, 5; 1.0; 3.0 (mol%)) which is doped by active ion xDy2O3. All of propofed chemical compounds are in the form of powder with a mass of 20 gram of mixture in an alumina crucible and prepared by melt-quenching method. The glass that has been obtained with a size (3x10x10) mm3 and smoothed to get a flat surface and high transparency. Optical properties of glass samples Dy:PBiNaGd determined by measuring by absorption spectrum and spectrophotometer at area visible with different consentration. Analysis indicate eleven inhomogeneous displacement bands at various positions and intensities with hypersensitive transitions at 1274 nm (6H15/2→6F11/2). Emission spectrum in medium glass Dy:PBiNaGd is supported using excitation wavelength (λeks) 350 nm and indicated that the highest intensity is in Dy:PBiNaGd4 where there four transition band emisin are namely 4H9/2 → 6H13/2 (483 nm), 4H9/2 → 6H11/2 nm), 4H9/2 → 6H9/2 (661 nm) and 4H9/2 → 6H6/2 (750 nm).

Keywords
Glass Phosphate, Disprosium, Photoluminescence

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/yreC6uJhawgY

Corresponding Author
Iwan Sugihartono

Institutions
1Program Studi Fisika, FMIPA Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220
2Program Studi Kimia, FMIPA Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220

Abstract
We have grown no-doped and Al-doped ZnO thin films with different Al element composition by ultrasonic spray pyrolysis (USP). The deposition by USP was performed with the temperature of 450 oC, ultrasonic frequency of 1.7 MHz, and under atmosphere ambient for 15 minutes on top of Si substrate. No-doped and Al-doped ZnO thin films were confirmed structurally by x-ray diffraction (XRD). Optical measurement also performed in order to observe absorbance, transmittance, and reflectance properties. Photoluminescence properties show two typical ZnO emissions i.e. ultraviolet and visible. Then, the relevance of structural properties and optical properties will be used to analyze the effect of Al element as dopant on characteristic of electrochemical impedance of ZnO thin films.

Keywords
Al doped ZnO, XRD, Optical measurement, Phototoluminescence, Electrochemical impedance

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/xKMXFJ8VPCaN

Corresponding Author
Eakgapon Kaewnuam

Institutions
1 Physics Program, Faculty of Science and Technology, Muban Chombueng Rajabhat University, Ratchaburi, 70150, Thailand
2 Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand
3 Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Abstract
In this work, lithium bismuth aluminium borate glasses doped with different concentration of Er3+ were prepared to investigate the physical, chemical unit, optical and luminescence properties. All glasses were prepared by melt-quenching method. Glass density is in a range of 3.20 – 3.27 g/cm3 with no obvious relation to Er2O3 concentration. The FTIR spectra confirms the tetrahedra BO4 borate unit appearing in glass network. This BO4 unit tend to increase with increment of Er2O3 content. Er3+ in glass absorb photon in visible light and near-infrared region, confirmed by the absorption spectra. The emission and excitation spectra perform the infrared emission of Er3+ under 523 and 975 nm excitation. The strongest emission with 1536 nm belongs to 1.00 mol% Er2O3 doped glass that was excited by photon with 523 nm. This developed glass possesses the good potential for using as the source and medium material for infrared emitting and communication device.

Keywords
Borate glass, Erbium ion, infrared emission

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/YncpCJtKTBuq