Near-Infrared Self-Powered Linearly Polarized Photodetection and Digital Incoherent Holography Using WSe2/ReSe2van der Waals Heterostructure

Jongtae Ahn, Kyul Ko, Ji Hoon Kyhm, Hyun Soo Ra, Heesun Bae, Sungjae Hong, Dae Yeon Kim, Jisu Jang, Tae Wook Kim, Sungwon Choi, Ji Hoon Kang, Namhee Kwon, Soohyung Park, Byeong Kwon Ju, Ting Chung Poon, Min Chul Park, Seongil Im, Do Kyung Hwang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Polarization-sensitive photodetection has attracted considerable attention as an emerging technology for future optoelectronic applications such as three-dimensional (3D) imaging, quantum optics, and encryption. However, traditional photodetectors based on Si or III-V InGaAs semiconductors cannot directly detect polarized light without additional optical components. Herein, we demonstrate a self-powered linear-polarization-sensitive near-infrared (NIR) photodetector using a two-dimensional WSe2/ReSe2 van der Waals heterostructure. The WSe2/ReSe2 heterojunction photodiode with semivertical geometry exhibits excellent performance: an ideality factor of 1.67, a broad spectral photoresponse of 405-980 nm with a significant photovoltaic effect, outstanding linearity with a linear dynamic range wider than 100 dB, and rapid photoswitching behavior with a cutoff frequency up to 100 kHz. Strongly polarized excitonic transitions around the band edge in ReSe2 lead to significant 980 nm NIR linear-polarization-dependent photocurrent. This linear polarization sensitivity remains stable even after exposure to air for longer than five months. Furthermore, by leveraging the NIR (980 nm)-selective linear polarization detection of this photodiode under photovoltaic operation, we demonstrate digital incoherent holographic 3D imaging.

Original languageEnglish
Pages (from-to)17917-17925
Number of pages9
JournalACS nano
Volume15
Issue number11
DOIs
Publication statusPublished - 2021 Nov 23

Keywords

  • 2D ReSe
  • 2D WSe
  • digital incoherent holography
  • heterostructure
  • linear polarization detection

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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