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Proceedings Paper

Reconfigurable Mie resonators embedded in a tunable ENZ cavity (Conference Presentation)
Author(s): Prasad P. Iyer; Mihir Pendharkar; Chris J. Palmstrom; Jon A. Schuller

Paper 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.

Paper Details

Date Published: 21 September 2017
Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103430R (21 September 2017); doi: 10.1117/12.2274548
Show Author Affiliations
Prasad P. Iyer, Univ. of California, Santa Barbara (United States)
Mihir Pendharkar, Univ. of California, Santa Barbara (United States)
Chris J. Palmstrom, Univ. of California, Santa Barbara (United States)
Jon A. Schuller, Univ. of California, Santa Barbara (United States)

Published in SPIE Proceedings Vol. 10343:
Metamaterials, Metadevices, and Metasystems 2017
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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