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Title: Hyperbolic secant graded index photonic crystal flat lens for subwavelength focusing of light
Authors: Evren, Aydın S.
Bor, Emre
Kurt, Hamza
Turduev, Mirbek
Keywords: Focusing
optical diffraction
optical refraction
optical imaging
integrated optics
Issue Date: 2019
Publisher: IEEE Computer Society
Source: Evren, A. S., Bor, E., Kurt, H., and Turduev, M. (2019, July). Hyperbolic Secant Graded Index Photonic Crystal Flat Lens for Subwavelength Focusing of Light. In 2019 21st International Conference on Transparent Optical Networks (ICTON) (pp. 1-4). IEEE.
Series/Report no.: International Conference on Transparent Optical Networks
Abstract: In this paper, we propose a graded index (GRIN) medium to obtain subwavelength focusing of light in high and low normalized frequency regimes by using all-dielectric materials. Distributed profile of hyperbolic secant GRIN structure is approximated by using two-dimensional (2D) photonics crystals (PCs). The focusing of light is quantitatively and systematically analyzed at low frequencies. It is clearly shown that the efficiency of focusing phenomenon changes as in terms of full-width at half-maximum (FHWM) and focal point distances according to structure length and other important parameters. Light focusing at subwavelength dimension has the capability of achieving unique contributions to lasing, optical imaging and microscopy, nanolithography, data storage and optical precision measurements. Moreover, an experimental verification of the numerical analyses is demonstrated in the microwave regime and corresponding results will be shared in the conference. © 2019 IEEE.
ISBN:  978-172812779-8
ISSN: 21627339
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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