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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 2094–2096

Broadband circular polarizer based on high-contrast gratings

Mehmet Mutlu, Ahmet E. Akosman, and Ekmel Ozbay  »View Author Affiliations


Optics Letters, Vol. 37, Issue 11, pp. 2094-2096 (2012)
http://dx.doi.org/10.1364/OL.37.002094


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Abstract

A circular polarizer, which is composed of periodic and two-dimensional dielectric high-contrast gratings, is designed theoretically such that a unity conversion efficiency is achieved at λ0=1.55μm. The operation is obtained by the achievement of the simultaneous unity transmission of transverse magnetic and transverse electric waves with a phase difference of π/2, meaning that an optimized geometrical anisotropy is accomplished. By the utilization of the rigorous coupled-wave analysis and finite-difference time-domain methods, it is shown that a percent bandwidth of 50% can be achieved when the operation bandwidth is defined as the wavelengths for which the conversion efficiency exceeds 0.9.

© 2012 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(260.5430) Physical optics : Polarization
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 19, 2012
Manuscript Accepted: April 6, 2012
Published: May 30, 2012

Citation
Mehmet Mutlu, Ahmet E. Akosman, and Ekmel Ozbay, "Broadband circular polarizer based on high-contrast gratings," Opt. Lett. 37, 2094-2096 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-11-2094


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