Dynamic bound states in the continuum

Fan, Kebin; Shadrivov, Ilya V.; Padilla, Willie J.

doi:10.1364/OPTICA.6.000169

Title: Dynamic bound states in the continuum

Journal Article · Fri Feb 08 00:00:00 EST 2019 · Optica

DOI:https://doi.org/10.1364/OPTICA.6.000169· OSTI ID:1493955

Fan, Kebin;

;

All-dielectric metasurfaces are a versatile platform to investigate a host of unconventional physical scattering responses. Effects, including high absorption and Huygens’ surfaces, have been demonstrated; however, a more exotic materialization—termed bound states in the continuum (BSCs)—exists and consists of nonradiating localized waves that lie within the energy spectrum of the continuum. Here we experimentally demonstrate a dynamic BSC at terahertz frequencies that realizes a material-limited high-quality factor ( $Q$ ) resonance $Q = 8.7 \times 10^{3}$ , which may be modified by over 2 orders of magnitude through photodoping with band gap light. We elucidate the nature of the BSC resonance, and our experimental results are well supported by eigenvalue and $S$ -parameter simulations. The demonstrated system and underlying theory establish a path to realize extremely high- $Q$ dynamic resonances, which may be useful for detection of hazardous materials and frequency-diverse imaging.

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Research Organization:: Duke Univ., Durham, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Australian Research Council (ARC); National Science Foundation (NSF); National Nanotechnology Coordinated Infrastructure (NNCI)

Grant/Contract Number:: SC0014372

OSTI ID:: 1493955

Alternate ID(s):: OSTI ID: 1612155

Journal Information:: Optica, Journal Name: Optica Vol. 6 Journal Issue: 2; ISSN 2334-2536

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 99 works

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