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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. 22, Iss. 9 — Sep. 1, 2005
  • pp: 1805–1813

Numerical study on spectral properties of tungsten one-dimensional surface-relief gratings for spectrally selective devices

Hitoshi Sai, Yoshiaki Kanamori, Kazuhiro Hane, and Hiroo Yugami  »View Author Affiliations


JOSA A, Vol. 22, Issue 9, pp. 1805-1813 (2005)
http://dx.doi.org/10.1364/JOSAA.22.001805


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Abstract

Spectral properties of one-dimensional tungsten gratings with various depths and widths of grooves were investigated by means of finite-difference time-domain simulation with a multi-Lorentz model. Shallow gratings showed a strong absorption peak due to surface plasmon polaritons when the oscillation of the electric field was parallel to the grating vector. On the other hand, deep gratings with wide grooves showed a different absorption attributed to the microcavity effect when the oscillation of the electric field was perpendicular to the grating vector. With narrowed grooves, another absorption with d-dependence occurred, which was probably due to vertically oscillating surface plasmons to the grooves.

© 2005 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(230.3990) Optical devices : Micro-optical devices
(350.5610) Other areas of optics : Radiation

History
Original Manuscript: December 13, 2004
Revised Manuscript: February 22, 2005
Manuscript Accepted: March 4, 2005
Published: September 1, 2005

Citation
Hitoshi Sai, Yoshiaki Kanamori, Kazuhiro Hane, and Hiroo Yugami, "Numerical study on spectral properties of tungsten one-dimensional surface-relief gratings for spectrally selective devices," J. Opt. Soc. Am. A 22, 1805-1813 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-9-1805

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