Enhanced optical transmission: Role of the localized surface plasmon

Wu, Shan; Wang, Qian-jin; Yin, Xiao-gang; Li, Jia-qi; Zhu, Ding; Liu, Shi-qiang; Zhu, Yong-yuan
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p101113
Academic Journal
We report the observation of enhanced optical transmission through the metal subwavelength hole arrays with nanoparticle inside the hole, and demonstrate the transmission enhancement and the suppression due to the excitation of the localized surface plasmon (LSP). We interpret this phenomenon with the Fano theory considering the real and imaginary parts of the polarizability of the LSP.


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