Phototunable Dielectric Huygens' Metasurfaces.

Published

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Fan, K; Zhang, J; Liu, X; Zhang, G-F; Averitt, RD; Padilla, WJ

Published Date

  • May 2018

Published In

Volume / Issue

  • 30 / 22

Start / End Page

  • e1800278 -

PubMed ID

  • 29635850

Pubmed Central ID

  • 29635850

Electronic International Standard Serial Number (EISSN)

  • 1521-4095

International Standard Serial Number (ISSN)

  • 0935-9648

Digital Object Identifier (DOI)

  • 10.1002/adma.201800278

Language

  • eng