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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 6 — Jun. 1, 2013
  • pp: 1569–1579

Mode transformation using graded photonic crystals with axial asymmetry

M. Turduev, B. B. Oner, I. H. Giden, and H. Kurt  »View Author Affiliations


JOSA B, Vol. 30, Issue 6, pp. 1569-1579 (2013)
http://dx.doi.org/10.1364/JOSAB.30.001569


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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.

© 2013 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(110.2760) Imaging systems : Gradient-index lenses
(130.3120) Integrated optics : Integrated optics devices
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 10, 2013
Revised Manuscript: April 13, 2013
Manuscript Accepted: April 18, 2013
Published: May 16, 2013

Citation
M. Turduev, B. B. Oner, I. H. Giden, and H. Kurt, "Mode transformation using graded photonic crystals with axial asymmetry," J. Opt. Soc. Am. B 30, 1569-1579 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-6-1569


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