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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 7 — Apr. 1, 2014
  • pp: 1976–1979

Mode conversion and coupling in a slanted grating

Shubin Li, Changhe Zhou, Hongchao Cao, Jun Wu, and Junjie Yu  »View Author Affiliations


Optics Letters, Vol. 39, Issue 7, pp. 1976-1979 (2014)
http://dx.doi.org/10.1364/OL.39.001976


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Abstract

We have proposed a novel transmission slanted grating at the central wavelength of 1550 nm, which can be used in optical communication. We have presented an approximate analytical expression that provides an insightful physical description of the simplified modal method for the slanted grating. The odd grating mode, which only exists in the asymmetric structure under normal incidence, plays the positive role of enhancing the 1st order diffraction efficiency. The analytic expressions of mode conversion and coupling can be obtained to explain the asymmetric field distribution, which cannot occur in the rectangular grating region. Numerical results achieved by the rigorous wave analysis verify the validity of the simplified modal method. We expect that the theoretical modal method set forth in this work will be helpful for the tremendous potential application of the slanted grating.

© 2014 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(050.1970) Diffraction and gratings : Diffractive optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 14, 2014
Revised Manuscript: February 26, 2014
Manuscript Accepted: February 27, 2014
Published: March 25, 2014

Citation
Shubin Li, Changhe Zhou, Hongchao Cao, Jun Wu, and Junjie Yu, "Mode conversion and coupling in a slanted grating," Opt. Lett. 39, 1976-1979 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-7-1976

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