Sammanfattning
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.
| Originalspråk | Engelska |
|---|---|
| Artikelnummer | 091111 |
| Tidskrift | Applied Physics Letters |
| Volym | 100 |
| Nummer | 9 |
| DOI | |
| Status | Publicerad - 2012 |
| Externt publicerad | Ja |
| MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Finansiering
The authors wish to thank Mariusz Graczyk for help with sample preparation and Professor Lars Montelius for stimulating discussions. This work was supported by the Swedish Research Council (VR), the Swedish Foundation for Strategic Research (SSF) through the Nanometer Structure Consortium at Lund University (nmC@LU), the Crafoord Foundation, EU program AMON-RA (No. 214814), E.ON AG through the E.ON International Research Initiative, and the National Basic Research Program of the Ministry of Science and Technology of China (Nos. 2012CB932703 and 2012CB932700).
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