Journal
ACS NANO
Volume 15, Issue 11, Pages 17917-17925Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c06234
Keywords
2D ReSe2; 2D WSe2; heterostructure; linear polarization detection; digital incoherent holography
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Funding
- National Research Foundation of Korea (NRF) [2020R1A6A3A01100165]
- Ministry of Culture, Sports and Tourism and Korea Creative Content Agency [R2017060005, R2020040080]
- NRF [2017R1A5A1014862]
- Korea Institute of Science and Technology (KIST) Institution Program [2E31011, 2E31012]
- National Research Foundation of Korea [2020R1A6A3A01100165] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study demonstrates a self-powered linear-polarization-sensitive near-infrared photodetector using a two-dimensional WSe2/ReSe2 van der Waals heterostructure, which exhibits excellent performance and enables digital incoherent holographic 3D imaging through NIR-selective linear polarization detection.
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.
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