Journal
OPTICAL MATERIALS EXPRESS
Volume 8, Issue 8, Pages 2264-2275Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.8.002264
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Funding
- AFRL [FA8650-10-C-17566]
- Penn State MRSEC [NSF-DMR-1420620]
- National Science Foundation [NSF-DMR-1308946]
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A reconfigurable metasurface made of Ge2Sb2Te5 phase-change material was experimentally demonstrated in the 1.55 mu m wavelength range. A nanostructured Ge2Sb2Te5 film on fused silica substrate was optimiz.ed to switch from highly transmissive (80%) to highly absorptive (76%) modes with a 7:1 contrast ratio in transmission independent of polarization, when thermally transformed from the amorphous to crystalline state. The metasurface was designed using a genetic algorithm optimizer linked with an efficient full-wave electromagnetic solver. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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