Solid source molecular beam epitaxy growth and physical properties of low-temperature-grown Fe-doped InGaAs films for terahertz photoconductive antennas

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Authors: Yin Yukun, YANG Wenlong, HOU Xiyu, SHI Haiyan, LI Donghai, Zhang Zitong, PAN Dong
Cited by: 0
References: 25

Abstract

针对1550 nm波段激光激励的太赫兹光电导天线对高性能光电材料的需求,我们利用固源分子束外延低温生长了InGaAs:Fe薄膜,研究了Fe掺杂浓度对材料微观结构与载流子输运性质的调控规律。高分辨X射线衍射与透射电子显微镜表征结果表明,所得InGaAs:Fe薄膜具有高晶体质量,Fe元素在InGaAs层中实现了均匀掺杂且未见明显相分离或团簇结构。霍尔效应测试进一步揭示了Fe掺杂浓度与材料电学性能之间的演变关系。结果显示,在Fe掺杂浓度为6.0× 1019 cm-3时,样品展现出最优的综合电学性能:载流子浓度可低至2.05× 1013 cm-3,电阻率可提升至381.82 Ω·cm,载流子迁移率可达到796.89 cm2/(V·s)。此外,利用飞秒瞬态泵浦-探测技术测得样品的载流子寿命仅为0.65 ps。本研究为研制高信噪比、超快响应的太赫兹光电导天线提供了材料支撑。

Fields of Study & Subjects

Terahertz technology and applications Advanced Semiconductor Detectors and Materials Semiconductor materials and interfaces

Publication details

Journal / source
Acta Physica Sinica
Volume
75
Issue
9
Publication date
1 January 2026
Language
ZH