Efficient coupling into slow light photonic crystal waveguide without transition region: role of evanescent modes.
We show that efficient coupling between fast and slow photonic crystal waveguide modes is possible, provided that there exist strong evanescent modes to match the waveguide fields across the interface. Evanescent modes are required when the propagating modes have substantially different modal fields, which occurs, for example, when coupling an index-guided mode and a gap-guided mode.
Martijn de Sterke
C
C
CUDOS, School of Physics, University of Sydney, NSW 2006, Australia. m.desterke@physics.usyd.edu.au
Dossou
K B
KB
White
T P
TP
Botten
L C
LC
McPhedran
R C
RC
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000379:methods*