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Multifunctional active reflectarray metasurfaces (Conference Presentation)

Kafaie Shirmanesh, Ghazaleh and Sokhoyan, Ruzan and Wu, Pin Chieh and Atwater, Harry A. (2019) Multifunctional active reflectarray metasurfaces (Conference Presentation). In: High Contrast Metastructures VIII. Proceedings of SPIE. No.10928. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 109280Q. ISBN 9781510624986. https://resolver.caltech.edu/CaltechAUTHORS:20190822-134052333

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Abstract

In the last several years, metasurfaces have demonstrated promise to control constitutive properties of light via interaction with nanoscale elements. Unlike the passive metasurfaces developed to date, actively controlled metasurface properties can enable the realization of new electrically-tunable low-profile optical components with numerous applications such as dynamic holograms, convergent lenses with reconfigurable focal lengths, and beam steering arrays, which are key requirements for future chip-based light detection and ranging (LIDAR) systems. In this work, we report a gate-tunable reflectarray metasurface, which can act as a focusing lens with reconfigurable focal length or as a beam steering device. This active reflectarray metasurface is actively controlled by use of indium tin oxide (ITO) as a material with voltage-tunable complex permittivity at 1550 nm operating wavelength. First, we experimentally demonstrate electrical control of the reflection phase and amplitude for metasurface unit elements, and we show that the phase shift of the metasurface unit element can be actively tuned from 0° to 300°. Our design enables independent electrical control of each metasurface element via individual application of the DC voltage. We also show that the same metasurface can exhibit multiple functionalities, acting both as a reconfigurable lens and a beam steering device.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2510673DOIVideo
ORCID:
AuthorORCID
Kafaie Shirmanesh, Ghazaleh0000-0003-1666-3215
Sokhoyan, Ruzan0000-0003-4599-6350
Wu, Pin Chieh0000-0002-5781-9696
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:10928
Record Number:CaltechAUTHORS:20190822-134052333
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190822-134052333
Official Citation:Ghazaleh Kafaie Shirmanesh, Ruzan Sokhoyan, Pin Chieh Wu, and Harry A. Atwater Jr. "Multifunctional active reflectarray metasurfaces (Conference Presentation)", Proc. SPIE 10928, High Contrast Metastructures VIII, 109280Q (8 March 2019); https://doi.org/10.1117/12.2510673
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98124
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:22 Aug 2019 21:16
Last Modified:03 Oct 2019 21:38

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