基于光泵浦-太赫兹探测的锑化镓光生载流子动力学研究
Research on Photogenerated Carrier Dynamics in Gallium Antimonide Based on Optical Pumping-Terahertz Detection
肖军 1刘泉澄 1高源 1邓琥2
作者信息
- 1. 西南科技大学信息工程学院,四川 绵阳 621010
- 2. 西南科技大学信息工程学院,四川 绵阳 621010;西南科技大学四川天府新区创新研究院,四川 成都 610299
- 折叠
摘要
采用反射式光泵浦-太赫兹探测技术开展锑化镓(GaSb)晶体光生载流子动力学研究.首先,测量波长为400 nm的不同能量密度泵浦光作用下太赫兹时域峰值强度的变化,计算得到GaSb晶体光生载流子复合时间;其次,测量波长为400 nm的不同能量密度泵浦光作用下GaSb晶体的太赫兹时域光谱,计算得到其在太赫兹频段的电导率;最后,采用Drude-Smith模型对电导率进行拟合,得到Smith参数和载流子散射时间.研究对GaSb材料改性和相关探测器的制造具有一定的指导意义.
Abstract
This study investigates the photogenerated carrier dynamics in gallium antimonide(GaSb)crystals using reflective optical pumping-terahertz detection technology.First,we examined fluctuations in terahertz time-domain peak intensity caused by varying the energy density pump light at a wavelength of 400 nm.Based on results of this examination,we derived the recombination time of photogenerated carriers in GaSb crystal.Next,we recorded the terahertz time-domain spectrum of GaSb crystals under different energy-density pump light conditions at a wavelength of 400 nm.This helped in calculating the GaSb conductivity in the terahertz frequency band.Finally,by leveraging the Drude-Smith model,we conducted conductivity fitting and extracted key parameters,including the Smith parameter and carrier scattering time.This study provides valuable insights into GaSb material modification and related detector manufacturing.
关键词
光生载流子动力学/锑化镓/光泵浦-太赫兹探测/电导率Key words
photogenerated carrier dynamics/gallium antimonide/optical pumping-terahertz detection/conductivity引用本文复制引用
出版年
2024
NETL
NSTL
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