Enhanced coupling of plasmons in hole arrays with periodic dielectric antennas.
We compare the angle-dependent transmission spectra of a metal hole array with dielectric pillars in each hole with that of a conventional metal hole array. The pillars enhance the optical transmission as well as the interaction between surface plasmon modes. This results in an observed splitting Delta omega/omega as large as 6%, at normal incidence, for the modes on the pillar side of the array.
Stolwijk
D
D
Huygens Laboratory, Leiden University, PO Box 9504, 2300 RA Leiden, The Netherlands.
Driessen
E F C
EF
Verschuuren
M A
MA
't Hooft
G W
GW
van Exter
M P
MP
de Dood
M J A
MJ