Simple Unbiased Hot-electron Polarization-sensitive Near-Infrared Photo-detector
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Authors
Mirzaee, Somayeh
Lebel, Olivier
Nunzi, JM
Date
2018-03-06
Type
journal article
Language
en
Keyword
Hot-Electron Photodetector , NIR Detection , Gold Nanostructure , Self-Affine Nanostructure , Nonlinear Optics , Tunnel Effect
Alternative Title
Abstract
Plasmonic nanostructures can generate energetic “hot” electrons from light in a broad band fashion depending on their shape, size, and arrangement. Such structures have a promising use in photodetectors, allowing high speed, broad band, and multicolor photodetection. Because they function without a band gap absorption, photon detection at any energy would be possible through engineering of the plasmonic nanostructure. Herein, a compact hot electron- based photodetector that combines polarization sensitivity and circularly polarized light detection in the near infrared region was fabricated using an indium tin oxide (ITO)−Au hybrid layer. Furthermore, the sensitivity of the device was significantly increased by adding a poled Azo molecular glass film in a capacitor configuration. The resulting device is capable of detecting light below the ITO band gap at ambient temperature without any bias voltage. This photodetector, which is amenable to large-area fabrication, can be integrated with other nanophotonic and nanoplasmonic structures for operation at telecom wavelengths.
Description
Citation
ACS Appl.Mater.Inter. 10, 11862-11871 (2018)
Publisher
American Chemical Society
License
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Appl. Mater. Interfaces, copyright © American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acsami.7b17836.