Hyperbolic Secant Graded Index Photonic Crystal Flat Lens for Subwavelength Focusing of Light

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 (P...

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Bibliographic Details
Published in2019 21st International Conference on Transparent Optical Networks (ICTON) pp. 1 - 4
Main Authors Evren, Aydin S., Bor, Emre, Kurt, Hamza, Turduev, Mirbek
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2019
Subjects
flat lens
Focusing
graded index
Indexes
Integrated optics
Lenses
microwave experiment
Optical diffraction
Optical imaging
Optical refraction
photonic crystals
subwavelength focusing
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Summary: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.
ISSN:2161-2064
DOI:10.1109/ICTON.2019.8840468