Resonant thermoelectric nanophotonics

Nature Nanotechnology
Kelly W MauserHarry A Atwater

Abstract

Photodetectors are typically based either on photocurrent generation from electron-hole pairs in semiconductor structures or on bolometry for wavelengths that are below bandgap absorption. In both cases, resonant plasmonic and nanophotonic structures have been successfully used to enhance performance. Here, we show subwavelength thermoelectric nanostructures designed for resonant spectrally selective absorption, which creates large localized temperature gradients even with unfocused, spatially uniform illumination to generate a thermoelectric voltage. We show that such structures are tunable and are capable of wavelength-specific detection, with an input power responsivity of up to 38 V W-1, referenced to incident illumination, and bandwidth of nearly 3 kHz. This is obtained by combining resonant absorption and thermoelectric junctions within a single suspended membrane nanostructure, yielding a bandgap-independent photodetection mechanism. We report results for both bismuth telluride/antimony telluride and chromel/alumel structures as examples of a potentially broader class of resonant nanophotonic thermoelectric materials for optoelectronic applications such as non-bandgap-limited hyperspectral and broadband photodetectors.

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Citations

Jun 7, 2018·Nanoscale·Woosung ParkKenneth E Goodson
Jun 13, 2017·Nature Nanotechnology·Ming Zhou, Zongfu Yu
Aug 31, 2018·Nature·Pavel ChebenDavid R Smith
Apr 3, 2019·Nature Materials·Jeremy J BaumbergDavid R Smith
Mar 22, 2019·Nature Communications·Zhibin ShaoJiansheng Jie
Feb 18, 2020·The Journal of Chemical Physics·Nicki Hogan, Matthew Sheldon
Sep 5, 2019·Advanced Materials·Xiaowei LuXinhe Bao
Jan 13, 2019·Nature Communications·Xiaowei LuXinhe Bao
Sep 15, 2018·Scientific Reports·Daniel AssumpcaoHyuck Choo
Nov 27, 2019·Nature Materials·Jon W StewartMaiken H Mikkelsen
Jul 23, 2020·Light, Science & Applications·Wei DaiHongxing Xu
Jan 30, 2021·ACS Applied Materials & Interfaces·Jie WangFanxin Liu
Jul 15, 2021·Light, Science & Applications·Wei DaiHongxing Xu
May 27, 2020·ACS Applied Materials & Interfaces·Meng ChenZiran Zhao
Apr 29, 2020·Nano Letters·Alexander LochbaumJuerg Leuthold

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