Giant enhancement of second-harmonic generation in multiple diffraction orders from sub-wavelength resonant waveguide grating.
We demonstrate a purely dielectric resonant waveguide structure that enhances the efficiency of second-harmonic generation by a factor of at least 5500 compared to a flat reference surface in the same geometry. We also show that the structure emits second-harmonic radiation in four different directions when the sample is illuminated with fundamental radiation incident at the resonant angle of the sample.
Saari
A
A
Optics Laboratory, Department of Physics, Tampere University of Technology, FIN-33101 Tampere, Finland.
Genty
G
G
Siltanen
M
M
Karvinen
P
P
Vahimaa
P
P
Kuittinen
M
M
Kauranen
M
M