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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 1330–1336

Controllable coherent perfect absorption in a composite film

Shourya Dutta-Gupta, O. J. F. Martin, S. Dutta Gupta, and G. S. Agarwal  »View Author Affiliations

Optics Express, Vol. 20, Issue 2, pp. 1330-1336 (2012)

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We exploit the versatility provided by metal–dielectric composites to demonstrate controllable coherent perfect absorption (CPA) or anti-lasing in a slab of heterogeneous medium. The slab is illuminated by coherent light from both sides, at the same angle of incidence and the conditions required for CPA are investigated as a function of the different system parameters. Our calculations clearly elucidate the role of absorption as a necessary prerequisite for CPA. We further demonstrate the controllability of the CPA frequency to the extent of having the same at two distinct frequencies even in presence of dispersion, rendering the realization of anti-lasers more flexible.

© 2012 OSA

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(240.0310) Optics at surfaces : Thin films
(260.3160) Physical optics : Interference
(160.1245) Materials : Artificially engineered materials
(260.2065) Physical optics : Effective medium theory
(140.3945) Lasers and laser optics : Microcavities
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Thin Films

Original Manuscript: November 21, 2011
Revised Manuscript: December 16, 2011
Manuscript Accepted: December 20, 2011
Published: January 6, 2012

Shourya Dutta-Gupta, O. J. F. Martin, S. Dutta Gupta, and G. S. Agarwal, "Controllable coherent perfect absorption in a composite film," Opt. Express 20, 1330-1336 (2012)

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