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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 29, Iss. 5 — May. 1, 2012
  • pp: 689–694

Electrodynamics analysis on coherent perfect absorber and phase-controlled optical switch

Tianjie Chen, Shaoguang Duan, and Y. C. Chen  »View Author Affiliations

JOSA A, Vol. 29, Issue 5, pp. 689-694 (2012)

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A coherent perfect absorber is essentially a specially designed Fabry–Perot interferometer, which completely extinguishes the incident coherent light. The one- and two-beam coherent perfect absorbers have been analyzed using classical electrodynamics by considering index matching in layered structures to totally suppress reflections. This approach presents a clear and physically intuitive picture for the principle of operation of a perfect absorber. The results show that the incident beam(s) must have correct phases and amplitudes, and the real and imaginary parts of the refractive indices of the media in the interferometer must satisfy a well-defined relation. Our results are in agreement with those obtained using the S -matrix analysis. However, the results were obtained solely based on the superposition of waves from multiple reflections without invoking the concept of time reversal as does the S -matrix approach. Further analysis shows that the two-beam device can be configured to function as a phase-controlled three-state switch.

© 2012 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(230.1150) Optical devices : All-optical devices
(260.2160) Physical optics : Energy transfer
(230.3750) Optical devices : Optical logic devices

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 4, 2011
Revised Manuscript: January 19, 2012
Manuscript Accepted: January 19, 2012
Published: April 11, 2012

Tianjie Chen, Shaoguang Duan, and Y. C. Chen, "Electrodynamics analysis on coherent perfect absorber and phase-controlled optical switch," J. Opt. Soc. Am. A 29, 689-694 (2012)

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