Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared
Abstract
Thermoelectric materials can be designed to support optical resonances across multiple spectral ranges to enable ultra-wide band photodetection. For instance, antimony telluride (Sb2Te3) chalcogenide exhibits interband plasmonic resonances in the visible range and Mie resonances in the mid-infrared (mid-IR) range, while simultaneously possessing large thermoelectric Seebeck coefficients. In this paper, we designed and fabricated Sb2Te3 metasurface devices to achieve resonant absorption for enabling photodetectors operating across an ultra-wideband spectrum, from visible to mid-IR. Furthermore, relying on asymmetric Sb2Te3 metasurface, we demonstrated the thermoelectric photodetectors with polarization-selectivity. This work provides a potential platform towards the portable ultrawide band spectrometers at room temperature, for environmental sensing applications.
Keywords
Cite
@article{arxiv.2409.04763,
title = {Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared},
author = {Shutao Zhang and Shu An and Mingjin Dai and Qing Yang Steve Wu and Nur Qalishah Adanan and Jun Zhang and Yan Liu and Henry Yit Loong Lee and Nancy Lai Mun Wong and Ady Suwardi and Jun Ding and Robert Edward Simpson and Qi Jie Wang and Joel K. W. Yang and Zhaogang Dong},
journal= {arXiv preprint arXiv:2409.04763},
year = {2024}
}