Use of quasi-local photorefractive response to generated superficial self-written waveguides in lithium niobate.
We report the formation of surface self-written waveguides by means of surface pyrolitons in lithium niobate. By a specific orientation of the crystal axis the quasi-local slow photorefractive response of lithium niobate was used to induce a self-confined beam exactly at the crystal-air interface. The mode profile of the photo-induced waveguide is strongly asymmetric due to the interface presence.
Eugenio
E
Fazio
Silviu T
ST
Popescu
Adrian
A
Petris
Fabrice
F
Devaux
Mauro
M
Ragazzi
Mathieu
M
Chauvet
Valentin I
VI
Vlad