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Dirac plasmon-assisted asymmetric hot carrier generation for room-temperature infrared detection

Author

Listed:
  • Alireza Safaei

    (University of Central Florida
    University of Central Florida)

  • Sayan Chandra

    (University of Central Florida)

  • Muhammad Waqas Shabbir

    (University of Central Florida
    University of Central Florida)

  • Michael N. Leuenberger

    (University of Central Florida
    University of Central Florida
    University of Central Florida)

  • Debashis Chanda

    (University of Central Florida
    University of Central Florida
    University of Central Florida)

Abstract

Due to the low photon energy, detection of infrared photons is challenging at room temperature. Thermoelectric effect offers an alternative mechanism bypassing material bandgap restriction. In this article, we demonstrate an asymmetric plasmon-induced hot-carrier Seebeck photodetection scheme at room temperature that exhibits a remarkable responsivity of 2900 VW−1, detectivity of 1.1 × 109 Jones along with a fast response of ~100 ns in the technologically relevant 8–12 µm band. This is achieved by engineering the asymmetric electronic environment of the generated hot carriers on chemical vapor deposition grown large area nanopatterned monolayer graphene, which leads to a temperature gradient of 4.7 K across the device terminals for an incident power of 155 nW, thereby enhancing the photo-thermoelectric voltage by manifold compared to previous reports. The results presented outline a strategy for uncooled, tunable, and multispectral infrared detection.

Suggested Citation

  • Alireza Safaei & Sayan Chandra & Muhammad Waqas Shabbir & Michael N. Leuenberger & Debashis Chanda, 2019. "Dirac plasmon-assisted asymmetric hot carrier generation for room-temperature infrared detection," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11458-5
    DOI: 10.1038/s41467-019-11458-5
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    Cited by:

    1. Sebastián Castilla & Hitesh Agarwal & Ioannis Vangelidis & Yuliy V. Bludov & David Alcaraz Iranzo & Adrià Grabulosa & Matteo Ceccanti & Mikhail I. Vasilevskiy & Roshan Krishna Kumar & Eli Janzen & Jam, 2024. "Electrical spectroscopy of polaritonic nanoresonators," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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