• Photonics Research
  • Vol. 11, Issue 8, 1465 (2023)
DaeHwan Ahn1、†, Sunghan Jeon1、2、†, Hoyoung Suh1, Seungwan Woo1, Rafael Jumar Chu1, Daehwan Jung1, Won Jun Choi1, Donghee Park1, Jin-Dong Song1, Woo-Young Choi2, and Jae-Hoon Han1、*
Author Affiliations
  • 1Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
  • 2Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
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    DOI: 10.1364/PRJ.491498 Cite this Article Set citation alerts
    DaeHwan Ahn, Sunghan Jeon, Hoyoung Suh, Seungwan Woo, Rafael Jumar Chu, Daehwan Jung, Won Jun Choi, Donghee Park, Jin-Dong Song, Woo-Young Choi, Jae-Hoon Han. High-responsivity InAs quantum well photo-FET integrated on Si substrates for extended-range short-wave infrared photodetector applications[J]. Photonics Research, 2023, 11(8): 1465 Copy Citation Text show less

    Abstract

    Low-intensity light detection necessitates high-responsivity photodetectors. To achieve this, we report In0.53Ga0.47As/InAs/In0.53Ga0.47As quantum well (InAs QW) photo-field-effect-transistors (photo-FETs) integrated on a Si substrate using direct wafer bonding. Structure of the InAs QW channel was carefully designed to achieve higher effective mobility and a narrower bandgap compared with a bulk In0.53Ga0.47As, while suppressing the generation of defects due to lattice relaxations. High-performance 2.6 nm InAs QW photo-FETs were successfully demonstrated with a high on/off ratio of 105 and a high effective mobility of 2370 cm2/(V·s). The outstanding transport characteristics in the InAs QW channel result in an optical responsivity 1.8 times greater than InGaAs photo-FETs and the fast rising/falling times. Further, we experimentally confirmed that the InAs QW photo-FET can detect light in the short-wavelength infrared (SWIR; 1.0–2.5 μm) near 2 μm thanks to bandgap engineering through InAs QW structures. Our result suggests that the InAs QW photo-FET is promising for high-responsivity and extended-range SWIR photodetector applications.
    Responsivity=IphPin=GmΔVthPin=WLPinμeffVDCoxΔVth,

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    DaeHwan Ahn, Sunghan Jeon, Hoyoung Suh, Seungwan Woo, Rafael Jumar Chu, Daehwan Jung, Won Jun Choi, Donghee Park, Jin-Dong Song, Woo-Young Choi, Jae-Hoon Han. High-responsivity InAs quantum well photo-FET integrated on Si substrates for extended-range short-wave infrared photodetector applications[J]. Photonics Research, 2023, 11(8): 1465
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