Phototunable Dielectric Huygens' Metasurfaces
- 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.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DE‐SC0014372
- OSTI ID:
- 1432591
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Vol. 30 Journal Issue: 22; ISSN 0935-9648
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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