首页|Strain-enhanced polarization sensitivity in β-Ga2O3 photodetector

Strain-enhanced polarization sensitivity in β-Ga2O3 photodetector

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Polarization-sensitive photodetection and imaging have great application value in fields such as polarization division multi-plexing optical communication,remote sensing,near-field imaging and military monitoring.Pursuing a high polarization ratio has always been the research hotspot in polarization-sensitive photodetectors.In this paper,we report a compression strain enhanced polarization ratio in β-gallium oxide(β-Ga2O3)single crystal flake.A rigorous crystallographic analysis confirmed its high crystalline quality and orientation.Angle-resolved polarization Raman spectroscopy(ARPRS)was adopted to study the anisotropy of its optical properties.Extensive ARPRS measurements and theoretical calculation consistently demonstrate the strong optical anisotropy in the high-quality β-Ga2O3 flake.A polarization ratio of 0.96 was obtained in the flat β-Ga2O3 flake.Furthermore,mechanical strain of±0.7％was introduced into β-Ga2O3.An increased polarization ratio of 0.98 was achieved in the case of 0.7％compression strain,which is,to the best of our knowledge,the highest value for UVC polarization-sensitive photodetectors.That corresponds to an improved polarization rejection ratio of 100.This work proposed a new path towards improving polarization sensitivity by applying strain engineering in the active material.

gallium oxidepolarization photodetectoranisotropystrain

Yonghui Zhang、Huili Liang、Fei Xing、Qiqian Gao、Yu Feng、Yuping Sun、Zengxia Mei

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School of Physics and Optoelectronic Engineering,Shandong University of Technology Zibo 255000,China

Songshan Lake Materials Laboratory Dongguan 523808,China

Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Youth Innovative Talents Attracting and Cultivating Plan of Colleges and Universities in Shandong ProvinceYouth Innovation Team of Colleges and Universities in Shandong ProvinceGuangdong Basic and Applied Basic Research Foundation山东省自然科学基金山东省自然科学基金山东省自然科学基金

61505109121742756217411311974108212022KJ2232022A1515110607ZR2021QF020ZR2022QF055ZR2021QE080

2024

10.1007/s11433-023-2307-6

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(4)
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