Phototunable Dielectric Huygens' Metasurfaces

Fan, Kebin; Zhang, Jingdi; Liu, Xinyu; Zhang, Gu‐Feng; Averitt, Richard D.; Padilla, Willie J.

doi:10.1002/adma.201800278

Phototunable Dielectric Huygens' Metasurfaces

Journal Article · Mon Apr 09 00:00:00 EDT 2018 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201800278· OSTI ID:1432591

Fan, Kebin ^[1]; Zhang, Jingdi ^[2]; Liu, Xinyu ^[1]; Zhang, Gu‐Feng ^[2]; Averitt, Richard D. ^[2]; ^[1]

Department of Electrical and Computer Engineering Duke University Box 90291 Durham NC 27708 USA
Department of Physics The University of California at San Diego La Jolla CA 92093 USA

Abstract

Conventional dielectric metasurfaces achieve their properties through geometrical tuning and consequently are static. Although some unique properties are demonstrated, the usefulness for realistic applications is thus inherently limited. Here, control of the resonant eigenmodes supported by Huygens' metasurface (HMS) absorbers through optical excitation is proposed and demonstrated. An intensity transmission modulation depth of 99.93% is demonstrated at 1.03 THz, with an associated phase change of greater than π/2 rad. Coupled mode theory and S‐parameter simulations are used to elucidate the mechanism underlying the dynamics of the metasurface and it is found that the tuning is primarily governed by modification of the magnetic dipole‐like odd eigenmode, which both lifts the degeneracy, and eliminates critical coupling. The dynamic HMS demonstrates wide tunability and versatility which is not limited to the spectral range demonstrated, offering a new path for reconfigurable metasurface applications.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0014372

OSTI ID:: 1432591

Alternate ID(s):: OSTI ID: 1537375

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 22 Vol. 30; ISSN 0935-9648

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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