Thermally Reconfigurable Meta-Optics
Journal Article - Open Access
University of California Santa Barbara United States
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Metasurfaces are two-dimensional nanostructures that allow unprecedented controlof light through engineering the amplitude, phase, and polarization across meta-atomresonators. Adding tunability to metasurface components would boost their potential andunlock a vast array of new application possibilities such as dynamic beam steering, tunablemetalenses, and reconfigurable meta-holograms, to name a few.We present here high-indexmeta-atoms, resonators, and metasurfaces reconfigured by thermal effects, across the nearto mid-infrared spectral ranges. We study thermal tunability in group IV and group IVVIsemiconductors, as well as in phase-transition materials, and demonstrate large dynamicresonance frequency shifts accompanied by significant amplitude and phase modulationin metasurfaces and resonators. We highlight the importance of high-Q resonances alongwith peak performance of thermal and thermo-optic effects, for efficient and practical reconfigurabledevices. This paper paves the way to efficient high-Q reconfigurable and activeinfrared metadevices.
- Electrical and Electronic Equipment