Pump dependent carrier lifetimes in InAs/GaAs quantum dot photoconductive terahertz antenna structures
Pump dependent carrier lifetimes in InAs/GaAs quantum dot photoconductive terahertz antenna structures
复制标题
InAs/GaAs 量子点光电导太赫兹天线结构中泵浦相关的载流子寿命
DOI：
10.1063/1.5083798
复制
发表时间：
2019
影响因子：
3.2
通讯作者：
E. Rafailov
中科院分区：
文献类型：
--
作者：
Andrei Gorodetsky;N. Bazieva;E. Rafailov
本文研究了含自组装InAs量子点的GaAs片中光激发载流子的行为。这些样品被设计和生长用于太赫兹(THz)产生的光导天线。注入的量子点缩短了总的载流子寿命，使激光器的泵浦波长在1μm到1.3μm之间。光抽运-太赫兹探测表明，由于俄歇弛豫增加了载流子捕获，无偏置天线中较高的泵浦功率导致了载流子寿命缩短。这一现象显著地拓宽了基于量子点的PCA的太赫兹频谱，并解释了前面所述的在较高频率下THz强度增加的原因。
In this paper, we study the behavior of photoexcited carriers in GaAs wafers containing self-assembled InAs quantum dots (QDs). These samples were designed and grown to be employed as photoconductive antennae for terahertz (THz) generation. The implanted QDs serve to shorten the overall carrier lifetime and enable pumping with lasers operating at wavelengths between 1 μ m and 1.3 μ m. Optical pump-THz probe measurements reveal carrier lifetime shortening for higher pump powers in the unbiased antennae due to increased carrier capture via Auger relaxation. This phenomenon significantly broadens the THz spectra from QD-based PCAs and explains the increased THz intensity at higher frequencies presented earlier.
影响因子：
4
作者：
M. Lumb;E. Clarke;E. Harbord;P. Spencer;R. Murray;F. Masia;P. Borri;W. Langbein;C. Leburn;C. Jappy;N. K. Metzger;C. Brown;W. Sibbett
通讯作者：
M. Lumb;E. Clarke;E. Harbord;P. Spencer;R. Murray;F. Masia;P. Borri;W. Langbein;C. Leburn;C. Jappy;N. K. Metzger;C. Brown;W. Sibbett
影响因子：
41.2
作者：
E. Zibik;E. Zibik;Thomas Grange;Thomas Grange;B. A. Carpenter;N. E. Porter;R. Ferreira;G. Bastard;D. Stehr;S. Winnerl;Manfred Helm;Huiyun Liu;Huiyun Liu;M. S. Skolnick;L. R. Wilson
通讯作者：
E. Zibik;E. Zibik;Thomas Grange;Thomas Grange;B. A. Carpenter;N. E. Porter;R. Ferreira;G. Bastard;D. Stehr;S. Winnerl;Manfred Helm;Huiyun Liu;Huiyun Liu;M. S. Skolnick;L. R. Wilson
DOI：
10.1109/jstqe.2016.2633870
发表时间：
2017-07-01
影响因子：
4.9
作者：
Fedorova, Ksenia A.;Gorodetsky, Andrei;Rafailov, Edik U.
通讯作者：
Rafailov, Edik U.