Extraordinary optical absorption through subwavelength slits
Optics Letters, Vol. 34, Issue 5, pp. 686-688 (2009)
http://dx.doi.org/10.1364/OL.34.000686
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Abstract
We report on the ability of resonant plasmonic slits to efficiently concentrate electromagnetic energy into a nanoscale volume of absorbing material placed inside or directly behind the slit. This gives rise to extraordinary optical absorption characterized by an absorption enhancement factor that well exceeds the enhancements seen for extraordinary optical transmission through slits. A semianalytic Fabry–Perot model for the resonant absorption is developed and shown to quantitatively agree with full-field simulations. We show that absorption enhancements of nearly 1000% can be realized at
© 2009 Optical Society of America
OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(260.5740) Physical optics : Resonance
ToC Category:
Physical Optics
History
Original Manuscript: December 5, 2008
Revised Manuscript: January 23, 2009
Manuscript Accepted: January 26, 2009
Published: February 27, 2009
Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics
Citation
Justin S. White, Georgios Veronis, Zongfu Yu, Edward S. Barnard, Anu Chandran, Shanhui Fan, and Mark L. Brongersma, "Extraordinary optical absorption through subwavelength slits," Opt. Lett. 34, 686-688 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-5-686
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