• Photonics Research
  • Vol. 9, Issue 11, 11002167 (2021)
Jiaqi Zhu1、2、3、†, He Zhu1、†, Mengjuan Liu2, Yao Wang2, Hanlun Xu2, Nasir Ali2, Huiyong Deng3, Zhiyong Tan4、5, Juncheng Cao4、5, Ning Dai1、3, and Huizhen Wu2、*
Author Affiliations
  • 1Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
  • 2Zhejiang Province Key Laboratory of Quantum Technology and Devices, Department of Physics, and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
  • 3State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 4Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
  • 5Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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    Abstract

    Broadband response is pursued in both infrared (IR) and terahertz (THz) detection technologies, which find their applications in both terrestrial and astronomical realms. Herein, we report an ultrabroadband and multiband IR/THz detector based on blocked-impurity-band detecting principle. The detectors are prepared by implanting phosphorus into germanium (Ge:P), where photoresponses with a P impurity band, a self-interstitial defect band, and a vacancy-P (V-P) pair defect band are realized simultaneously. The response spectra of the detectors show ultrabroad and dual response bands in a range of 3–28 μm (IR band) and 40–165 μm (THz band), respectively. Additionally, a tiny mid-IR (MIR) band within 3–4.2 μm is embedded in the IR band. The THz band arises from the P impurity band, whereas the IR and the MIR bands are ascribed to the two defect bands. At 150 mV and 4.5 K, the peak detectivities of the three bands are obtained as 2.9×1012 Jones (at 3.9 μm), 6.8×1012 Jones (at 16.3 μm), and 9.9×1012 Jones (at 116.5 μm), respectively. The impressive coverage and sensitivity of the detectors are promising for applications in IR and THz detection technologies.
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    Jiaqi Zhu, He Zhu, Mengjuan Liu, Yao Wang, Hanlun Xu, Nasir Ali, Huiyong Deng, Zhiyong Tan, Juncheng Cao, Ning Dai, Huizhen Wu. Ultrabroadband and multiband infrared/terahertz photodetectors with high sensitivity[J]. Photonics Research, 2021, 9(11): 11002167
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    Category: Optoelectronics
    Received: May. 7, 2021
    Accepted: Aug. 25, 2021
    Published Online: Oct. 9, 2021
    The Author Email: Huizhen Wu (hzwu@zju.edu.cn)