Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass
碩士 === 高雄醫學大學 === 醫藥暨應用化學系碩士班 === 93 === Cadmium sulfide ( at room temperature) embedded in phosphorous glass is prepared by a melt and heat-treatment method. A large amount of these nanocrystals appear as dark ball shape with radius roughly ranging from 5 to 20 nm by the TEM analysis. A Q-switche...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2005
|
Online Access: | http://ndltd.ncl.edu.tw/handle/89562584013643879802 |
id |
ndltd-TW-093KMC05537021 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-093KMC055370212015-12-23T04:07:59Z http://ndltd.ncl.edu.tw/handle/89562584013643879802 Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass 硫化鎘奈米晶粒玻璃複合材料製成及其非線形吸光現象 Yi-Lien Tu 杜宜蓮 碩士 高雄醫學大學 醫藥暨應用化學系碩士班 93 Cadmium sulfide ( at room temperature) embedded in phosphorous glass is prepared by a melt and heat-treatment method. A large amount of these nanocrystals appear as dark ball shape with radius roughly ranging from 5 to 20 nm by the TEM analysis. A Q-switched Nd:YAG laser delivery linearly polarized pulses at 532 and 1064 nm wavelength with ~6 nanosecond pulse width are employed as light source for the nonlinear absorption experiments. For our 532 nm incident pulses with , the nonlinear attenuation can be attributed to the two photon absorption (TPA) and the free carrier absorption (FCA) above the band gaps of these quantum dots; where the free carriers are suggested to be generated by the process of TPA. The propagation equation is , where is the TPA coefficient and N is the instantaneous free carrier density given by . We fit these two equations to the data of our open-aperture Z-scan measurements to obtain a =-1.67 (cm/GW) and α = 0.01(cm-1) .Upon excitation with 1064 nm ( ) laser pulses in this CdS doped glass at room temperature, similar results are obtained .We also observed the glasses of phosphorous and silicate photoluminescence properties have different . Tsai-Chuan Wen 文在川 2005 學位論文 ; thesis 93 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 高雄醫學大學 === 醫藥暨應用化學系碩士班 === 93 === Cadmium sulfide ( at room temperature) embedded in phosphorous glass is prepared by a melt and heat-treatment method. A large amount of these nanocrystals appear as dark ball shape with radius roughly ranging from 5 to 20 nm by the TEM analysis. A Q-switched Nd:YAG laser delivery linearly polarized pulses at 532 and 1064 nm wavelength with ~6 nanosecond pulse width are employed as light source for the nonlinear absorption experiments.
For our 532 nm incident pulses with , the nonlinear attenuation can be attributed to the two photon absorption (TPA) and the free carrier absorption (FCA) above the band gaps of these quantum dots; where the free carriers are suggested to be generated by the process of TPA. The propagation equation is , where is the TPA coefficient and N is the instantaneous free carrier density given by . We fit these two equations to the data of our open-aperture Z-scan measurements to obtain a =-1.67 (cm/GW) and α = 0.01(cm-1) .Upon excitation with 1064 nm ( ) laser pulses in this CdS doped glass at room temperature, similar results are obtained .We also observed the glasses of phosphorous and silicate photoluminescence properties have different .
|
author2 |
Tsai-Chuan Wen |
author_facet |
Tsai-Chuan Wen Yi-Lien Tu 杜宜蓮 |
author |
Yi-Lien Tu 杜宜蓮 |
spellingShingle |
Yi-Lien Tu 杜宜蓮 Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
author_sort |
Yi-Lien Tu |
title |
Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
title_short |
Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
title_full |
Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
title_fullStr |
Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
title_full_unstemmed |
Nonlinear absorption in CdS semiconductor microcrystallines doped phosphorous glass |
title_sort |
nonlinear absorption in cds semiconductor microcrystallines doped phosphorous glass |
publishDate |
2005 |
url |
http://ndltd.ncl.edu.tw/handle/89562584013643879802 |
work_keys_str_mv |
AT yilientu nonlinearabsorptionincdssemiconductormicrocrystallinesdopedphosphorousglass AT dùyílián nonlinearabsorptionincdssemiconductormicrocrystallinesdopedphosphorousglass AT yilientu liúhuàlìnàimǐjīnglìbōlífùhécáiliàozhìchéngjíqífēixiànxíngxīguāngxiànxiàng AT dùyílián liúhuàlìnàimǐjīnglìbōlífùhécáiliàozhìchéngjíqífēixiànxíngxīguāngxiànxiàng |
_version_ |
1718155709681500160 |