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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 18, Iss. 7 — Jul. 1, 2001
  • pp: 1765–1776

Polarization conversion by reflection in a thin-film grating

S. R. Seshadri  »View Author Affiliations


JOSA A, Vol. 18, Issue 7, pp. 1765-1776 (2001)
http://dx.doi.org/10.1364/JOSAA.18.001765


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Abstract

A dielectric-film waveguide with a grating etched on its film–cover interface can be used as a polarization converter. The e wave can be converted into the h wave and vice versa if the guided wave is incident obliquely to the grating vector. The polarization converter is analyzed by use of a quasi-optic technique. A high degree of polarization-conversion efficiency is achieved by a suitable choice of the grating length. The Bragg angles of incidence and observation, the maximum polarization-conversion efficiency, and the frequency and the angular selectivity are all found to increase with an increase in the grating period. An illustrative numerical example is presented.

© 2001 Optical Society of America

OCIS Codes
(230.3120) Optical devices : Integrated optics devices
(230.5440) Optical devices : Polarization-selective devices
(260.5430) Physical optics : Polarization
(310.2790) Thin films : Guided waves

History
Original Manuscript: June 1, 2000
Revised Manuscript: August 28, 2000
Manuscript Accepted: August 28, 2000
Published: July 1, 2001

Citation
S. R. Seshadri, "Polarization conversion by reflection in a thin-film grating," J. Opt. Soc. Am. A 18, 1765-1776 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-7-1765

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