Visible and near-infrared dual band switchable metasurface edge imaging

Posted on 08.08.2022 - 15:15
Optical edge detection at visible and near infrared (VNIR) wavelengths is deployed in sectors including spectroscopy, autonomous driving, and manufacturing. In this work, we demonstrate, numerically, transmissive VNIR dual-band edge imaging with a switchable metasurface. Tunability in the metasurfaces unit cells is enabled by Sb2S3 – a low-loss phase-change material, which can be switched reversibly between crystalline and amorphous state thermally. Compared with previously reported edge imaging metasurfaces, our proposed metasurface acts simultaneously as a high-pass spatial filter and a tunable spectral filter, giving the system the freedom to switch between two functions. In Function 1 with crystalline Sb2S3, this metasurface operates in the edge detection mode near 575 nm in the visible light and blocks near infrared (NIR) transmission. In Function 2 with amorphous Sb2S3, the device images edges near 825 nm in NIR, and blocks visible light images. Switchable Sb2S3 metasurfaces allow low crosstalk edge imaging of a target without complicated optomechanics.


Chen, Guanghao; Zhou, Junxiao; Bopp, Steven; Zhao, Junxiang; Liu, Zhaowei (2022): Visible and near-infrared dual band switchable metasurface edge imaging. Optica Publishing Group. Collection.
Select your citation style and then place your mouse over the citation text to select it.



Usage metrics

Optics Letters


Guanghao Chen
Junxiao Zhou
Steven Bopp
Junxiang Zhao
Zhaowei Liu


need help?