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Title: Polarization independent high transmission large numerical aperture laser beam focusing and deflection by dielectric Huygens' metasurfaces
Authors: Özdemir, Aytekin
Hayran, Zeki
Takashima, Yuzuru
Kurt, Hamza
Keywords: Metasurfaces
Phase shift
Subwavelength structures
Issue Date: 15-Oct-2017
Publisher: Elsevier Science Bv
Source: Özdemir, A., Hayran, Z., Takashima, Y., & Kurt, H. (2017). Polarization independent high transmission large numerical aperture laser beam focusing and deflection by dielectric Huygens’ metasurfaces. Optics Communications, 401, 46-53.
Abstract: In this letter, we propose all-dielectric Huygens' metasurface structures to construct high numerical aperture flat lenses and beam deflecting devices. The designed metasurface consists of two-dimensional array of all dielectric nanodisk resonators with spatially varying radii, thereby introducing judiciously designed phase shift to the propagating light. Owing to the overlap of Mie-type magnetic and electric resonances, high transmission was achieved with rigorous design analysis. The designed flat lenses have numerical aperture value of 0.85 and transmission values around 80%. It also offers easy fabrication and compatibility with available semiconductor technology. This spectrally and physically scalable, versatile design could implement efficient wavefront manipulation or beam shaping for high power laser beams, as well as various optical microscopy applications without requiring plasmonic structures that are susceptible to ohmic loss of metals and sensitive to the polarization of light. (C) 2017 Elsevier B.V. All rights reserved.
ISSN: 0030-4018
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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