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Proceedings Paper

Tunable metasurfaces with liquid crystals
Author(s): Nazmi Yilmaz; Fehim T. Bagci; Aytekin Ozdemir; Ibrahim H. Giden; Ahmet Ozer; Yuzuru Takashima; Hamza Kurt
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Paper Abstract

Intensive researches in the area of metasurfaces have provided a new insight to obtain flat and compact optical systems. In this letter, we numerically show that, highly efficient tunable beam steering effect in transmission mode is achieved at wavelength λ = 550 nm using nematic liquid crystals (LCs) infiltrated into double sided metasurfaces. Using the electrooptical feature of LCs, the phase profile of the metasurfaces is controlled and thus, the transmitted beam is deflected within the range from -15° to 15° steering angles. Transparent dielectric materials are used in the designed structure that provides highly efficient beam-steering; the corresponding transmission efficiency is above 83% in the visible spectrum, which is another superiority of the proposed hybrid tunable structure over present plasmonic/metamaterial approaches. The designed metasurface still preserves its beam deflection property covering the visible spectrum and hence, such hybrid structure can be implemented for broadband electro-optically controllable beam steering applications.

Paper Details

Date Published: 7 May 2018
PDF: 6 pages
Proc. SPIE 10671, Metamaterials XI, 106712N (7 May 2018); doi: 10.1117/12.2307515
Show Author Affiliations
Nazmi Yilmaz, TOBB Univ. of Economics and Technology (Turkey)
Fehim T. Bagci, TOBB Univ. of Economics and Technology (Turkey)
Aselsan Inc. (Turkey)
Aytekin Ozdemir, College of Optical Sciences, The Univ. of Arizona (United States)
Ibrahim H. Giden, TOBB Univ. of Economics and Technology (Turkey)
Ahmet Ozer, TOBB Univ. of Economics and Technology (Turkey)
Yuzuru Takashima, College of Optical Sciences, The Univ of Arizona (United States)
Hamza Kurt, TOBB Univ. of Economics and Technology (Turkey)

Published in SPIE Proceedings Vol. 10671:
Metamaterials XI
Allan D. Boardman; Anatoly V. Zayats; Kevin F. MacDonald, Editor(s)

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