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Plasmon-enhanced photoresponse of deep-subwavelength GaAs NW photodetector

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Abstract

According to optical diffraction limit, the photoresponsity of nanowire (NW)-based photodetector exponentially decreases when its NW diameter reduces to the range of deep subwavelength. In this paper, we demonstrate a photoresponse-enhanced method of the deep-subwavelength GaAs NW photodetector by using a plasmon-driven dipole antenna. Considering that the enhancement is extremely influenced by the shape and size of antenna, the structure of antenna is optimized by finite difference time domain (FDTD) solutions. The optimal structure of antenna optimizes the responsivity-enhanced factors to 1123.3 and 224.7 in NW photodetectors with NW diameters of 20 nm and 60 nm, respectively. This photoresponse-enhanced method is promising for easy-integration high-performance nanoscale photodetectors.

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Authors and Affiliations

  1. School of Computer & Information Engineering, Anyang Normal University, Anyang, 455000, China

    Bang Li  (李邦) & Yongge Liu  (刘永革)

  2. Key Laboratory of Oracle Bone Inscriptions Information Processing, Ministry of Education of China, Anyang, 455000, China

    Bang Li  (李邦) & Yongge Liu  (刘永革)

  3. Henan Key Laboratory of Oracle Bone Inscriptions Information Processing, Anyang, 455000, China

    Bang Li  (李邦) & Yongge Liu  (刘永革)

  4. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Yanni Tang  (唐燕妮), Xin Yan  (颜鑫) & Xia Zhang  (张霞)

Authors
  1. Bang Li  (李邦)
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  2. Yanni Tang  (唐燕妮)
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  3. Xin Yan  (颜鑫)
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  4. Xia Zhang  (张霞)
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  5. Yongge Liu  (刘永革)
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Corresponding author

Correspondence to Bang Li  (李邦).

Additional information

This work has been supported by the National Natural Science Foundation of China (Nos.61774021, 61806007 and 61911530133), the Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China (No.IPOC2019ZT07), the Fundamental Research Funds for the Central Universities (No.2018XKJC05), the Project of Key Science and Technology in Henan Province (No.202102310562), the Fund of Key Laboratory of Oracle Bone Inscriptions Information Processing, Ministry of Education of China (No.OIP2019M006), the Research Foundation of Anyang Normal University (No.AYNUKPY-2019-04), and the Anyang Scientific and Technological Project (No.2021C01X012).

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Li, B., Tang, Y., Yan, X. et al. Plasmon-enhanced photoresponse of deep-subwavelength GaAs NW photodetector. Optoelectron. Lett. 17, 385–389 (2021). https://doi.org/10.1007/s11801-021-0120-8

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  • DOI: https://doi.org/10.1007/s11801-021-0120-8

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