Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-08-11
Phys. Rev. Lett. 99, 066805(2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 5 figures, 26 references
Scientific paper
10.1103/PhysRevLett.99.066805
Metal films grown on Si wafer perforated with a periodic array of subwavelength holes have been fabricated and anomalous enhanced transmission in the mid-infrared regime has been observed. High order transmission peaks up to Si(2,2) are clearly revealed due to the large dielectric constant contrast of the dielectrics at the opposite interfaces. Si(1,1) peak splits at oblique incidence both in TE and TM polarization, which confirms that anomalous enhanced transmission is a surface plasmon polaritons (SPPs) assisted diffraction phenomenon. Theoretical transmission spectra agree excellently with the experimental results and confirm the role of SPPs diffraction by the lattice.
Fang Xu
Han Xiufeng
Kamran M.
Li Zhiyuan
Liu Rongjuan
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