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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. 20, Iss. 3 — Mar. 1, 2003
  • pp: 569–572

Temporal coupled-mode theory for the Fano resonance in optical resonators

Shanhui Fan, Wonjoo Suh, and J. D. Joannopoulos  »View Author Affiliations


JOSA A, Vol. 20, Issue 3, pp. 569-572 (2003)
http://dx.doi.org/10.1364/JOSAA.20.000569


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Abstract

We present a theory of the Fano resonance for optical resonators, based on a temporal coupled-mode formalism. This theory is applicable to the general scheme of a single optical resonance coupled with multiple input and output ports. We show that the coupling constants in such a theory are strongly constrained by energy-conservation and time-reversal symmetry considerations. In particular, for a two-port symmetric structure, Fano-resonant line shape can be derived by using only these symmetry considerations. We validate the analysis by comparing the theoretical predictions with three-dimensional finite-difference time-domain simulations of guided resonance in photonic crystal slabs. Such a theory may prove to be useful for response-function synthesis in filter and sensor applications.

© 2003 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(230.3990) Optical devices : Micro-optical devices
(230.4040) Optical devices : Mirrors
(230.5750) Optical devices : Resonators

History
Original Manuscript: July 25, 2002
Revised Manuscript: October 3, 2002
Manuscript Accepted: October 21, 2002
Published: March 1, 2003

Citation
Shanhui Fan, Wonjoo Suh, and J. D. Joannopoulos, "Temporal coupled-mode theory for the Fano resonance in optical resonators," J. Opt. Soc. Am. A 20, 569-572 (2003)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-20-3-569


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