Metasurfaces for Enhancing Light Absorption in Thermoelectric Photodetectors

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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

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 languageEnglish
Pages (from-to)2468-2473
Number of pages6
JournalACS Photonics
Volume7
Issue number9
Early online date28 Jul 2020
DOIs
Publication statusPublished - 16 Sep 2020
Externally publishedYes

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