Direct observation of a transition of a surface plasmon resonance from a photonic crystal effect |
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| Authors: | Zhang Weili Azad Abul K Han Jiaguang Xu Jingzhou Chen Jian Zhang X-C |
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| Institution: | School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA. |
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| 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. |
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