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Phys Rev Lett. 2007 May 4;98(18):183901. Epub 2007 May 1.

Direct observation of a transition of a surface plasmon resonance from a photonic crystal effect.

Author information

  • 1School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.

Abstract

Transition of surface-plasmon resonance from out-of-plane photonic crystal effect is observed in a semiconductor array of subwavelength holes by optical pump-terahertz probe measurements. The dielectric properties of the photoexcited array are essentially altered by the intense optical excitation due to photogenerated free carriers. As a result, the array becomes metallic and favors the coupling and propagation of surface plasmons. The photoinduced resonant extremes agree well with the Fano model.

PMID:
17501575
[PubMed]
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