Light deflection and modulation through dynamic evolution of photoinduced waveguides.
Light induced waveguides produced by lateral illumination of a hotorefractive crystal show a complex dynamic evolution upon removal of the sustaining applied electric field. Using this effect, deflection and modulation of the guided light is realized by taking advantage of the screening and counter-screening of the space charge distribution. The spot separation upon deflection can exceed 10 times the original waveguide width. Numerical simulations of the refractive index evolution and beam propagation show a good agreement with the observations.
Laboratoire Matériaux Optiques, Photonique et Systèmes University Paul Verlaine-Metz and Supelec, CNRS UMR 7132, Metz, France. germano.montemezzani@metz.supelec.fr
Germano
G
Montemezzani
Mohamed
M
Gorram
Nicolas
N
Fressengeas
Flurin
F
Juvalta
Mojca
M
Jazbinsek
Peter
P
Günter
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*; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*