Reconfigurable near-IR metasurface based on Ge2Sb2Te5 phase-change material

Alexej V. Pogrebnyakov, Jeremy A. Bossard, Jeremiah P. Turpin, J. David Musgraves, Hee Jung Shin, Clara Riverobaleine, Nikolas Podraza, Kathleen A. Richardson, Douglas H. Werner, Theresa S. Mayer

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


A reconfigurable metasurface made of Ge2Sb2Te5 phase-change material was experimentally demonstrated in the 1.55 μm wavelength range. A nanostructured Ge2Sb2Te5 film on fused silica substrate was optimized 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 fullwave electromagnetic solver.

Original languageEnglish (US)
Pages (from-to)2264-2275
Number of pages12
JournalOptical Materials Express
Issue number8
StatePublished - Aug 1 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials


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