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1 PublicationActive optical metasurfaces based on defect-engineered phase-transition materials
Rensberg, J.; Zhang, S.; Zhou, Y.; Mcleod, A. S.; Schwarz, C.; Goldflam, M.; Liu, M.; Kerbusch, J.; Nawrodt, R.; Ramanathan, S.; Basov, D. N.; Capasso, F.; Ronning, C.; Kats, M.
Abstract
Active, widely tunable optical materials, such as phase-transition materials, have enabled rapid advances in photonics and optoelectronics, especially in the emerging field of meta-surfaces and meta-devices. Here, we demonstrate that spatially selective defect engineering on the nanometer scale can transform phase-transition materials into optical metasurfaces. Using ion irradiation through nanometer-scale masks, we selectively defect-engineered the insulator-metal transition of vanadium dioxide, a prototypical correlated phase-transition material whose optical properties change dramatically depending on its state. Using this robust technique, we demonstrated several optical metasurfaces, including tunable absorbers with artificially induced phase co-existence and tunable polarizers based on thermally triggered dichroism. Spatially selective nanoscale defect engineering represents a new paradigm for active photonic structures and devices.
Keywords: metasurfaces; metamaterials; meta-devices; defect engineering; phase-transition materials
Involved research facilities
- Ion Beam Center DOI: 10.17815/jlsrf-3-159
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Permalink: https://www.hzdr.de/publications/Publ-22972