Electrically reconfigurable non-volatile metasurface using low-loss optical phase-change material
Name
2008.06659.pdf
Description
Published version
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650.43 KB
Format
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Checksum (MD5)
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Author(s)
Zhang, Yifei
Fowler, Clayton
Liang, Junhao
Azhar, Bilal
Shalaginov, Mikhail Y
Deckoff-Jones, Skylar
An, Sensong
Chou, Jeffrey B
Roberts, Christopher M
Liberman, Vladimir
Date Issued
2021
Journal
Nature Nanotechnology
Publisher
Springer Science and Business Media LLC
Citation
Zhang, Yifei, Fowler, Clayton, Liang, Junhao, Azhar, Bilal, Shalaginov, Mikhail Y et al. 2021. "Electrically reconfigurable non-volatile metasurface using low-loss optical phase-change material." Nature Nanotechnology, 16 (6).
Version
Original manuscript
Abstract
Active metasurfaces promise reconfigurable optics with drastically improved compactness, ruggedness, manufacturability and functionality compared to their traditional bulk counterparts. Optical phase-change materials (PCMs) offer an appealing material solution for active metasurface devices with their large index contrast and non-volatile switching characteristics. Here we report a large-scale, electrically reconfigurable non-volatile metasurface platform based on optical PCMs. The optical PCM alloy used in the devices, Ge2Sb2Se4Te (GSST), uniquely combines giant non-volatile index modulation capability, broadband low optical loss and a large reversible switching volume, enabling notably enhanced light-matter interactions within the active optical PCM medium. Capitalizing on these favourable attributes, we demonstrated quasi-continuously tuneable active metasurfaces with record half-octave spectral tuning range and large optical contrast of over 400%. We further prototyped a polarization-insensitive phase-gradient metasurface to realize dynamic optical beam steering.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Lincoln Laboratory
MIT Materials Research Laboratory
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DOI of Published Version
https://doi.org/10.1038/S41565-021-00881-9
