Asymmetry reversal in the reflection from a two-dimensional photonic crystal.
The measured, angle-dependent, reflection spectra of a two-dimensional GaAs photonic crystal consist of an asymmetric peak on top of an oscillating background. At large angles of incidence (>70 degrees), the asymmetry of the peak is observed to flip for p-polarized light. We explain the observed spectra with a Fano model that includes loss and interference between a resonant waveguide component and direct Fresnel reflection of the layered structure. We show that the reversal of the asymmetry of the line is due to a change in sign of the direct reflection at Brewster's angle.
Driessen
E F C
EF
Huygens Laboratory, Leiden University, The Netherlands. driessen@molphys.leidenuniv.nl
Stolwijk
D
D
de Dood
M J A
MJ