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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. 9 — Sep. 1, 2001
  • pp: 2109–2120

Normally incident resonant grating reflection filters for efficient narrow-band spectral filtering of finite beams

Donald K. Jacob, Steven C. Dunn, and M. G. Moharam  »View Author Affiliations


JOSA A, Vol. 18, Issue 9, pp. 2109-2120 (2001)
http://dx.doi.org/10.1364/JOSAA.18.002109


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Abstract

Resonant grating reflection filters operating at normal incidence are investigated. At normal incidence these structures are shown to have characteristics different from those of structures operated at oblique incidence. We show how higher-order diffraction within the structure laterally confines the incident energy about the point of incidence and results in a broadened angular selectivity. Multimode structures are shown to exhibit broader angular selectivities and narrower spectral linewidths than those of single-mode structures, achieving angular selectivities hundreds of times broader than what could be obtained at oblique incidence. When compared with that for oblique incidence, the increase in angular selectivity is shown to greatly improve the performance of these filters for spectrally filtering finite incident beams.

© 2001 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics

Citation
Donald K. Jacob, Steven C. Dunn, and M. G. Moharam, "Normally incident resonant grating reflection filters for efficient narrow-band spectral filtering of finite beams," J. Opt. Soc. Am. A 18, 2109-2120 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-9-2109


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