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. © 2007 The American Physical Society.
CITATION STYLE
Zhang, W., Azad, A. K., Han, J., Xu, J., Chen, J., & Zhang, X. C. (2007). Direct observation of a transition of a surface plasmon resonance from a photonic crystal effect. Physical Review Letters, 98(18). https://doi.org/10.1103/PhysRevLett.98.183901
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