Excitations of surface plasmon polaritons in double layer metal grating structures

N. Anttu*, Z. Q. Guan, U. Hkanson, H. X. Xu, H.Q. Xu

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

12 Citeringar (Scopus)


We study the light scattering properties of double layer gratings (DLGs) made from Au on SiO 2 substrates. It is found that surface plasmon polaritons (SPPs) can be excited in the DLGs for a separation of up to 150 nm between the two Au grating layers and the collective reflectance spectra exhibit a strong resonant peak and a closely lying dip as a result of the surface plasmon polariton excitations. It is also found that the angle-resolved specular reflectance spectra show a dip-peak pair structure, while the angle-resolved reflectance spectra of higher diffracted orders show a complementary peak-dip pair structure. Finally, operation of the DLGs for efficient wavelength demultiplexing is proposed and discussed in light of these results.

TidskriftApplied Physics Letters
StatusPublicerad - 27 feb 2012
MoE-publikationstypA1 Tidskriftsartikel-refererad


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