Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs
碩士 === 國立中山大學 === 物理學系研究所 === 88 === Abstracts Photoreflectance(PR) of surface-intrinsic n+ type doped GaAs has been measured for various power densities of pumping laser.The spectra exhibited many Franz-Keldysh oscillations,where by the electric field(F) can be determined from the technique of th...
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ndltd-TW-088NSYS51980092016-07-08T04:22:57Z http://ndltd.ncl.edu.tw/handle/50087591425152528262 Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs 砷化鎵半導體的光調制光譜的調制場效應 Chien-Ju Yin 簡茹吟 碩士 國立中山大學 物理學系研究所 88 Abstracts Photoreflectance(PR) of surface-intrinsic n+ type doped GaAs has been measured for various power densities of pumping laser.The spectra exhibited many Franz-Keldysh oscillations,where by the electric field(F) can be determined from the technique of the fast fourier transform.It is known that F's determined from PR are subjected to photovoltaic effect ,but it is difficult to estimate the strength of modulating field in the PR measurements.Hence we have investigated the relation between F and modulating field by using electroreflectance to simulate PR.In this work,the relation will be confirmed by using solely PR.Here a method was devised to obtain the strength of modulating field in the PR measurements.The photo-voltage(Vs)of the pump beam can be measured directly with a lock-in amplifier by making electrical contacts on the front and rear sides of the sample.The strengh of modulation field is equal to Vs/d due to a uniform F in the undoped layer,where d is the thickness of the undoped layer. Dong-Po Wang 王東波 2000 學位論文 ; thesis 39 zh-TW |
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碩士 === 國立中山大學 === 物理學系研究所 === 88 === Abstracts
Photoreflectance(PR) of surface-intrinsic n+ type doped GaAs has been measured for various power densities of pumping laser.The spectra exhibited many Franz-Keldysh oscillations,where by the electric field(F) can be determined from the technique of the fast fourier transform.It is known that F's determined from PR are subjected to photovoltaic effect ,but it is difficult to estimate the strength of modulating field in the PR measurements.Hence we have investigated the relation between F and modulating field by using electroreflectance to simulate PR.In this work,the relation will be confirmed by using solely PR.Here a method was devised to obtain the strength of modulating field in the PR measurements.The photo-voltage(Vs)of the pump beam can be measured directly with a lock-in amplifier by making electrical contacts on the front and rear sides of the sample.The strengh of modulation field is equal to Vs/d due to a uniform F in the undoped layer,where d is the thickness of the undoped layer.
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author2 |
Dong-Po Wang |
author_facet |
Dong-Po Wang Chien-Ju Yin 簡茹吟 |
author |
Chien-Ju Yin 簡茹吟 |
spellingShingle |
Chien-Ju Yin 簡茹吟 Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
author_sort |
Chien-Ju Yin |
title |
Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
title_short |
Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
title_full |
Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
title_fullStr |
Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
title_full_unstemmed |
Effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped GaAs |
title_sort |
effect of modulating field on photoreflectance of surface-intrinsic-n+ type doped gaas |
publishDate |
2000 |
url |
http://ndltd.ncl.edu.tw/handle/50087591425152528262 |
work_keys_str_mv |
AT chienjuyin effectofmodulatingfieldonphotoreflectanceofsurfaceintrinsicntypedopedgaas AT jiǎnrúyín effectofmodulatingfieldonphotoreflectanceofsurfaceintrinsicntypedopedgaas AT chienjuyin shēnhuàjiābàndǎotǐdeguāngdiàozhìguāngpǔdediàozhìchǎngxiàoyīng AT jiǎnrúyín shēnhuàjiābàndǎotǐdeguāngdiàozhìguāngpǔdediàozhìchǎngxiàoyīng |
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