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arXiv · 2409.04763

Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared

Shutao Zhang·Shu An·Mingjin Dai·Qing Yang Steve Wu·Nur Qalishah Adanan·Jun Zhang·Yan Liu·Henry Yit Loong Lee·Nancy Lai Mun Wong·Ady Suwardi·Jun Ding·Robert Edward Simpson·Qi Jie Wang·Joel K. W. Yang·Zhaogang Dong
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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.

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Shutao Zhang, Shu An, Mingjin Dai, Qing Yang Steve Wu, Nur Qalishah Adanan, Jun Zhang, Yan Liu, Henry Yit Loong Lee, Nancy Lai Mun Wong, Ady Suwardi, Jun Ding, Robert Edward Simpson, Qi Jie Wang, Joel K. W. Yang, Zhaogang Dong. 2024-09-07. Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared. https://arxiv.org/abs/2409.04763

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