Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/2736
Title: Accelerating beam generation via all-dielectric metasurfaces
Authors: Yılmaz, Nazmi
Bağcı, Fehim Taha
Özer, Ahmet
Kurt, Hamza
Keywords: Metamaterials 
 polarization 
anomalous reflection
Issue Date: 2019
Publisher: SPIE
Source: Yilmaz, N., Bagci, F. T., Ozer, A., and Kurt, H. (2019, April). Accelerating beam generation via all-dielectric metasurfaces. In Metamaterials XII (Vol. 11025, p. 110250K). International Society for Optics and Photonics.
Abstract: All-dielectric metasurfaces are unique component to control optical wavefront with high transmission or reflection coefficient. Recently, accelerating beam, which propagates along curved arbitrary trajectories, has been realized with conventional diffractive optical elements (DOE). However, DOE suffer from low sampling ratio of rapid phase gradients and its diffraction efficiency drops quickly when the wavelength is switched to another wavelength which is different than the designed wavelength. In this study, we show accelerating beam which is generated by highly efficient and polarization insensitive all-dielectric metasurfaces in the visible wavelength. The acceleration beam is numerically generated with the proposed metasurfaces which are composed of TiO2 nanopillars residing on glass substrate using finite difference time-domain computational method. It is shown that this beam has the ability to propagate curved trajectories in air medium. Transmission efficiency of the proposed structure is above 65% and desired arbitrary trajectories have been achieved. Generating highly efficient accelerating beam can be used in photonic applications in optical imaging, spectroscopy, optical micromanipulation and nonlinear optics. © 2019 SPIE.
URI: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11025/2520971/Accelerating-beam-generation-via-all-dielectric-metasurfaces/10.1117/12.2520971.short
https://hdl.handle.net/20.500.11851/2736
ISBN: 978-151062716-1
ISSN:  0277786X
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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