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Title: Electrically tunable metasurfaces incorporating a phase change material

Abstract

Electrically tunable metasurfaces including an array of subwavelength metasurface unit elements are presented. The unit elements include a stacked metal-insulator-metal structure within which an active phase change layer is included. A purely insulator, metal, or coexisting metal-insulator phase of the active layer can be electrically controlled to tune an amplitude and phase response of the metasurfaces. In combination with the subwavelengths dimensions of the unit elements, the phase and amplitude response can be controlled in a range from optical wavelengths to millimeter wavelength of incident light. Electrical control of the unit elements can be provided via resistive heating produced by flow of current though a top metal layer of the unit elements. Alternatively, electrical control of the unit elements can be provided via electrical field effect produced by applying a voltage differential between the top and bottom metal layers of the unit elements.

Inventors:
; ; ; ; ; ;
Issue Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1998419
Patent Number(s):
11662504
Application Number:
16/740,322
Assignee:
California Institute of Technology (Pasadena, CA)
DOE Contract Number:  
FG02-07ER46405
Resource Type:
Patent
Resource Relation:
Patent File Date: 01/10/2020
Country of Publication:
United States
Language:
English

Citation Formats

Kim, Yonghwi, Wu, Pin Chieh, Sokhoyan, Ruzan, Mauser, Kelly W., Glaudell, Rebecca D., Kafaie Shirmanesh, Ghazaleh, and Atwater, Harry A. Electrically tunable metasurfaces incorporating a phase change material. United States: N. p., 2023. Web.
Kim, Yonghwi, Wu, Pin Chieh, Sokhoyan, Ruzan, Mauser, Kelly W., Glaudell, Rebecca D., Kafaie Shirmanesh, Ghazaleh, & Atwater, Harry A. Electrically tunable metasurfaces incorporating a phase change material. United States.
Kim, Yonghwi, Wu, Pin Chieh, Sokhoyan, Ruzan, Mauser, Kelly W., Glaudell, Rebecca D., Kafaie Shirmanesh, Ghazaleh, and Atwater, Harry A. Tue . "Electrically tunable metasurfaces incorporating a phase change material". United States. https://www.osti.gov/servlets/purl/1998419.
@article{osti_1998419,
title = {Electrically tunable metasurfaces incorporating a phase change material},
author = {Kim, Yonghwi and Wu, Pin Chieh and Sokhoyan, Ruzan and Mauser, Kelly W. and Glaudell, Rebecca D. and Kafaie Shirmanesh, Ghazaleh and Atwater, Harry A.},
abstractNote = {Electrically tunable metasurfaces including an array of subwavelength metasurface unit elements are presented. The unit elements include a stacked metal-insulator-metal structure within which an active phase change layer is included. A purely insulator, metal, or coexisting metal-insulator phase of the active layer can be electrically controlled to tune an amplitude and phase response of the metasurfaces. In combination with the subwavelengths dimensions of the unit elements, the phase and amplitude response can be controlled in a range from optical wavelengths to millimeter wavelength of incident light. Electrical control of the unit elements can be provided via resistive heating produced by flow of current though a top metal layer of the unit elements. Alternatively, electrical control of the unit elements can be provided via electrical field effect produced by applying a voltage differential between the top and bottom metal layers of the unit elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {5}
}

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