Dual-Band Organic Photodetectors for Dual-Channel Optical Communications

Zhaojue Lan; Ying Suet Lau; Linfeng Cai; Jiayin Han; Chun Wai Suen; Furong Zhu

doi:10.1002/lpor.202100602

Dual-Band Organic Photodetectors for Dual-Channel Optical Communications

Zhaojue Lan, Ying Suet Lau, Linfeng Cai, Jiayin Han, Chun Wai Suen, Furong Zhu^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

34 Citations (Scopus)

Abstract

The dual-band organic photodetectors (OPDs) detect incoming light selectively in two different bands. This work demonstrates a bias-switchable dual-band OPD, achieving a fast-switching speed of over 1000 times per second and a −3 dB cutoff frequency of > 100 kHz for high-speed optical communications in two distinct bands, e.g., near-infrared (NIR) and visible light. Visible-blind NIR detection with a high responsivity of 435 mA W^–1 is realized for the OPDs operated under a small reverse bias of −1.0 V. NIR-blind visible light detection with a responsivity of 325 mA W^–1 is obtained for the OPDs operated under a low forward bias of 1.0 V. Dual-channel NIR/visible optical communication technique has been demonstrated, providing an opportunity for a plethora of applications in information electronics and the Internet-of-Things.

Original language	English
Article number	2100602
Journal	Laser and Photonics Reviews
Volume	16
Issue number	7
DOIs	https://doi.org/10.1002/lpor.202100602
Publication status	Published - Jul 2022

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

User-Defined Keywords

bias-switchable
dual-band
heterojunctions
near-infrared
optical communication
organic photodetectors

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10.1002/lpor.202100602

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title = "Dual-Band Organic Photodetectors for Dual-Channel Optical Communications",

abstract = "The dual-band organic photodetectors (OPDs) detect incoming light selectively in two different bands. This work demonstrates a bias-switchable dual-band OPD, achieving a fast-switching speed of over 1000 times per second and a −3 dB cutoff frequency of > 100 kHz for high-speed optical communications in two distinct bands, e.g., near-infrared (NIR) and visible light. Visible-blind NIR detection with a high responsivity of 435 mA W–1 is realized for the OPDs operated under a small reverse bias of −1.0 V. NIR-blind visible light detection with a responsivity of 325 mA W–1 is obtained for the OPDs operated under a low forward bias of 1.0 V. Dual-channel NIR/visible optical communication technique has been demonstrated, providing an opportunity for a plethora of applications in information electronics and the Internet-of-Things.",

keywords = "bias-switchable, dual-band, heterojunctions, near-infrared, optical communication, organic photodetectors",

author = "Zhaojue Lan and Lau, {Ying Suet} and Linfeng Cai and Jiayin Han and Suen, {Chun Wai} and Furong Zhu",

note = "Funding Information: This work was financially supported by the Research Grants Council, University Grants Committee, Hong Kong, General Research Fund (12303920), Collaborative Research Fund (C5037‐18GF), and NSFC/RGC Joint Research Scheme (N_HKBU201/19). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

year = "2022",

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doi = "10.1002/lpor.202100602",

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AU - Lan, Zhaojue

AU - Lau, Ying Suet

AU - Cai, Linfeng

AU - Han, Jiayin

AU - Suen, Chun Wai

AU - Zhu, Furong

N1 - Funding Information: This work was financially supported by the Research Grants Council, University Grants Committee, Hong Kong, General Research Fund (12303920), Collaborative Research Fund (C5037‐18GF), and NSFC/RGC Joint Research Scheme (N_HKBU201/19). Publisher Copyright: © 2022 Wiley-VCH GmbH.

PY - 2022/7

Y1 - 2022/7

N2 - The dual-band organic photodetectors (OPDs) detect incoming light selectively in two different bands. This work demonstrates a bias-switchable dual-band OPD, achieving a fast-switching speed of over 1000 times per second and a −3 dB cutoff frequency of > 100 kHz for high-speed optical communications in two distinct bands, e.g., near-infrared (NIR) and visible light. Visible-blind NIR detection with a high responsivity of 435 mA W–1 is realized for the OPDs operated under a small reverse bias of −1.0 V. NIR-blind visible light detection with a responsivity of 325 mA W–1 is obtained for the OPDs operated under a low forward bias of 1.0 V. Dual-channel NIR/visible optical communication technique has been demonstrated, providing an opportunity for a plethora of applications in information electronics and the Internet-of-Things.

AB - The dual-band organic photodetectors (OPDs) detect incoming light selectively in two different bands. This work demonstrates a bias-switchable dual-band OPD, achieving a fast-switching speed of over 1000 times per second and a −3 dB cutoff frequency of > 100 kHz for high-speed optical communications in two distinct bands, e.g., near-infrared (NIR) and visible light. Visible-blind NIR detection with a high responsivity of 435 mA W–1 is realized for the OPDs operated under a small reverse bias of −1.0 V. NIR-blind visible light detection with a responsivity of 325 mA W–1 is obtained for the OPDs operated under a low forward bias of 1.0 V. Dual-channel NIR/visible optical communication technique has been demonstrated, providing an opportunity for a plethora of applications in information electronics and the Internet-of-Things.

KW - bias-switchable

KW - dual-band

KW - heterojunctions

KW - near-infrared

KW - optical communication

KW - organic photodetectors

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Dual-Band Organic Photodetectors for Dual-Channel Optical Communications

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