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Proceedings Paper

Accelerating beam generation via all-dielectric metasurfaces
Author(s): Nazmi Yilmaz; Fehim T. Bagci; Ahmet Ozer; Hamza Kurt
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Paper 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.

Paper Details

Date Published: 30 April 2019
PDF: 6 pages
Proc. SPIE 11025, Metamaterials XII, 110250K (30 April 2019); doi: 10.1117/12.2520971
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)
Ahmet Ozer, TOBB Univ. of Economics and Technology (Turkey)
Hamza Kurt, TOBB Univ. of Economics and Technology (Turkey)

Published in SPIE Proceedings Vol. 11025:
Metamaterials XII
Vladimír Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

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