Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/7065
Title: Mode transformation using graded photonic crystals with axial asymmetry
Authors: Turduev, Mirbek
Öner, Bilgehan Barış
Giden, İbrahim Halil
Kurt, H.
Keywords: [No Keywords]
Issue Date: 2013
Publisher: Optical Soc Amer
Abstract: We propose a mode conversion method that enables transformation of the propagating mode from fundamental to higher-order modes by utilizing asymmetric graded index (A-GRIN) structures. Refractive index variations of two different asymmetric gradient profiles, i.e., exponential and Luneburg lens profiles, have been approximated by two-dimensional photonic crystals (PCs). The basic structure is composed of constant radii with different lattice sizes. The designed GRIN mode converters provide relatively high transmission efficiency in the spectral region of interest and achieve the transformation in compact configuration. Numerical approaches utilizing the finite-difference time-domain and plane wave expansion methods are used to analyze the mode conversion phenomenon of proposed GRIN PC media. Analytical formulation based on ray theory is outlined to explore both ray trajectories and the physical concept of a wavefront retardation mechanism. (C) 2013 Optical Society of America
URI: https://doi.org/10.1364/JOSAB.30.001569
https://hdl.handle.net/20.500.11851/7065
ISSN: 0740-3224
1520-8540
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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