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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

  • Editor: Stephen A. Burns
  • Vol. 23, Iss. 6 — Jun. 1, 2006
  • pp: 1513–1522

Non-Hermitian polarizers: a biorthogonal analysis

Tiberiu Tudor  »View Author Affiliations


JOSA A, Vol. 23, Issue 6, pp. 1513-1522 (2006)
http://dx.doi.org/10.1364/JOSAA.23.001513


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Abstract

The non-Hermitian operators of the ideal nonorthogonal multilayer optical polarizers are spectrally analyzed in the framework of skew-angular biorthonormal vector bases. It is shown that these polarizers correspond to skew projectors and their operators are generated by skew projectors, exactly as the canonical ideal polarizers correspond to Hermitian projectors. Thus the common feature of all the polarizers (Hermitian and non-Hermitian) is that their “nuclei” are (orthogonal or skew) projectors—the generating projectors. It is shown that if these nonorthogonal polarizers are looked upon as variable devices, two kinds of degeneracy may occur for suitable values of the inner parameter of the device: The corresponding operators may become normal (more precisely, Hermitian) or, on the contrary, very pathological—defective and singular. In the first case their eigenvectors and biorthogonal conjugate eigenvectors collapse into a unique pair of eigenvectors; in the second case their eigenvectors (as well as their biorthogonal conjugates) collapse into a single vector.

© 2006 Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(260.5430) Physical optics : Polarization

ToC Category:
Physical Optics

History
Original Manuscript: July 18, 2005
Revised Manuscript: October 18, 2005
Manuscript Accepted: November 14, 2005

Citation
Tiberiu Tudor, "Non-Hermitian polarizers: a biorthogonal analysis," J. Opt. Soc. Am. A 23, 1513-1522 (2006)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-6-1513

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