Metasurfaces for Enhancing Light Absorption in Thermoelectric Photodetectors

Nityanand Sharma, Jonathan Bar-David, Noa Mazurski, Uriel Levy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Metasurfaces can be used to enhance the absorption in metallic and dielectric thin films. Taking advantage of this property, we experimentally demonstrate the use of a commercially available thermoelectric device as a thermoelectric photodetector by integrating it with a metallic metasurface array operating as an absorption enhancer for both the visible and the short-wave infrared. Electrical measurement shows that the responsivity of the nanostructured region is an order of magnitude higher than the flat film region. The absorption spectrum and correspondingly the spectral response of the device can be tailored by optimizing the metasurface dimensions. As such, the device can be used as a multiband photodetector for diverse applications.

Original languageAmerican English
Pages (from-to)2468-2473
Number of pages6
JournalACS Photonics
Volume7
Issue number9
DOIs
StatePublished - 16 Sep 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • FIB
  • SWIR
  • enhanced absorption
  • metasurfaces
  • thermoelectric

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