Spatial optical simultons in nonlinearly coupled planar waveguides.
With second-harmonic generation in surface and buried planar waveguides achieved by direct and reverse proton exchange in lithium niobate, we demonstrate a novel kind of quadratic spatial simulton: The transverse-electric fundamental input and the transverse-magnetic second-harmonic waves nonlinearly couple two superimposed planar waveguides, permitting transverse localization of light at room temperature and at excitations as low as 340 nJ in 20-ps pulses.
Leo
Giuseppe
G
NOOEL--Nonlinear Optics and OptoElectronics Laboratory, National Institute for the Physics of Matter, Department of Electronic Engineering, University Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy.
Colace
Lorenzo
L
Amoroso
Antonio
A
Di Falco
Andrea
A
Assanto
Gaetano
G