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Title: Tunable Metasurfaces with Liquid Crystals
Authors: Yılmaz, Nazmi
Bağcı, Fehim Taha
Özdemir, Aytekin
Giden, İbrahim Halil
Özer, Ahmet
Takashima, Yuzuru
Kurt, Hamza
Keywords: Metasurfaces
liquid crystals
nanostructured materials
optoelectronic devices
Issue Date: Apr-2018
Publisher: SPIE
Source: Yilmaz, N., Bagci, F. T., Ozdemir, A., Giden, I. H., Ozer, A., Takashima, Y. And Kurt, H. (2018, May). Tunable metasurfaces with liquid crystals. In Metamaterials XI (Vol. 10671, p. 106712N). International Society for Optics and Photonics.
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 lambda = 550 nm using nematic liquid crystals (LCs) infiltrated into double sided metasurfaces. Using the electro-optical feature of LCs, the phase profile of the metasurfaces is controlled and thus, the transmitted beam is deflected within the range from -15 degrees to 15 degrees 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.
ISBN: 978-151061868-8
ISSN: 0277-786X
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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