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5 October 2015 Tunable metasurfaces (Presentation Recording)
Harry A. Atwater Jr.
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Proceedings Volume 9544, Metamaterials, Metadevices, and Metasystems 2015; 954422 (2015) https://doi.org/10.1117/12.2191641
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States
Abstract
Metasurfaces composed of sub-wavelength artificial structures show promise for extraordinary light-manipulation and development of ultrathin optical components such as lenses, wave plates, orbital angular detection, and holograms over a broad range of the electromagnetic spectrum. However structures developed to date do not allow for post-fabrication control of antenna properties. We have investigated the integration of the transparent conductor indium tin oxide (ITO) active elements to realize gate-tunable phased arrays of subwavelength patch antenna in a metasurface configuration to enable gate tunable permittivity. The magnetic dipole resonance of each patch antenna interacts with the carrier density-dependent permittivity resonance of the ITO to enable phase and amplitude tunability. Operation of patch antennas and beam steering phased arrays will be discussed.
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Harry A. Atwater Jr. "Tunable metasurfaces (Presentation Recording)", Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 954422 (5 October 2015); https://doi.org/10.1117/12.2191641
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KEYWORDS
Antennas
Phased arrays
Electromagnetism
Holograms
Indium
Lenses
Optical components
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