Evaluation of deep trap compensation ratio and recombination parameters by transient grating techniques

A. Kadys, K. Jarašiūnas, P. Delaye, D. Verstraeten
{"title":"Evaluation of deep trap compensation ratio and recombination parameters by transient grating techniques","authors":"A. Kadys, K. Jarašiūnas, P. Delaye, D. Verstraeten","doi":"10.1117/12.815623","DOIUrl":null,"url":null,"abstract":"We demonstrate a novel application of time-resolved transient grating technique for determination of deep trap occupation ratio in semi-insulating crystals. Light diffraction kinetics on a transient reflection grating with very small period (150 nm) provided conditions for studies of absorption nonlinearity and its discrimination from the coexisting free carrier and electro-optic ones. By numerical modeling of absorption grating kinetics in subnanosecond time domain, we determined the contributions of the recharged deep traps and two-photon absorption to diffraction kinetics and evaluated in this way the deep trap compensation ratio in differently grown GaAs crystals. Moreover, the decay time of the absorption grating provided the rate of carrier capture to these dominant deep traps, which have been recharged under illumination. Using this feature, we were able to monitor the thermal annealing process in vanadium-doped CdTe crystals: it has not effected the charge state of vanadium related deep traps, but reduced the concentration of the active residual carrier capture centers in the crystal.","PeriodicalId":273853,"journal":{"name":"International Conference on Advanced Optical Materials and Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2008-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Conference on Advanced Optical Materials and Devices","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.815623","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

We demonstrate a novel application of time-resolved transient grating technique for determination of deep trap occupation ratio in semi-insulating crystals. Light diffraction kinetics on a transient reflection grating with very small period (150 nm) provided conditions for studies of absorption nonlinearity and its discrimination from the coexisting free carrier and electro-optic ones. By numerical modeling of absorption grating kinetics in subnanosecond time domain, we determined the contributions of the recharged deep traps and two-photon absorption to diffraction kinetics and evaluated in this way the deep trap compensation ratio in differently grown GaAs crystals. Moreover, the decay time of the absorption grating provided the rate of carrier capture to these dominant deep traps, which have been recharged under illumination. Using this feature, we were able to monitor the thermal annealing process in vanadium-doped CdTe crystals: it has not effected the charge state of vanadium related deep traps, but reduced the concentration of the active residual carrier capture centers in the crystal.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
瞬态光栅技术评价深阱补偿比和复合参数
我们展示了时间分辨瞬态光栅技术在半绝缘晶体中测定深阱占据比的新应用。极小周期(150 nm)瞬态反射光栅的光衍射动力学为研究吸收非线性及其与共存的自由载流子和电光载流子的区分提供了条件。通过亚纳秒时域吸收光栅动力学的数值模拟,确定了充电深阱和双光子吸收对衍射动力学的贡献,并以此评估了不同生长方式的砷化镓晶体的深阱补偿比。此外,吸收光栅的衰减时间提供了这些优势深阱的载流子捕获速率,这些深阱在照明下被充电。利用这一特性,我们能够监测掺钒CdTe晶体的热退火过程:它没有影响钒相关深阱的电荷状态,但降低了晶体中活性残余载流子捕获中心的浓度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
TiO2-PHT interface influence to charge carrier photo generation and recombination Electronic eye occluder with time-counting and reflection control Formation of deep acceptor centers in AlGaN alloys Characterizing semiconductor materials with terahertz radiation pulses Photoinduced AsSeS thin film phase plates as adaptive optics mirrors for eye aberration correction
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1