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21 September 2017 Reconfigurable Mie resonators embedded in a tunable ENZ cavity (Conference Presentation)
Prasad P. Iyer, Mihir Pendharkar, Chris J. Palmstrom, Jon A. Schuller
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Proceedings Volume 10343, Metamaterials, Metadevices, and Metasystems 2017; 103430R (2017) https://doi.org/10.1117/12.2274548
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States
Abstract
Reconfigurable Mie resonator metasurfaces may give rise to new classes of programmable optical devices. Large phase and amplitude modulations can be achieved with high-Q resonances that are tunable by at least one line-width. We experimentally demonstrate narrow linewidth, reconfigurable Mie resonators comprising undoped InSb wires embedded inside a highly doped InSb Epsilon-Near-Zero (ENZ) cavity. We demonstrate a Q-factor increase of 400% by embedding a high index resonator within, instead of atop, an ENZ substrate. Systematic studies of varying width resonators reveal significant differences in coupling to the ENZ media for TM and TE resonators. A large refractive index modulation (Δn ≥1.5) is achieved with heating (80-575K), stemming from variations in the effective mass of free-carriers. Thermally tuning the ENZ wavelength of the cavity by >2μm (13-15.5μm) emables reconfigurable tuning by multiple line-widths. This ultra-wide thermal tunability of high-Q embedded resonators may enable new class of active metadevices in the mid-infrared wavelength regime.
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Prasad P. Iyer, Mihir Pendharkar, Chris J. Palmstrom, and Jon A. Schuller "Reconfigurable Mie resonators embedded in a tunable ENZ cavity (Conference Presentation)", Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103430R (21 September 2017); https://doi.org/10.1117/12.2274548
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KEYWORDS
Resonators
Amplitude modulation
Mid-IR
Modulation
Optical components
Phase shift keying
Refractive index
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