Optically induced photovoltaic self-defocusing-to-self-focusing transition.
We show theoretically and experimentally that the photovoltaic nonlinearity that gives rise to spatial solitons can be switched from self-defocusing to self-focusing (or vice versa) by use of background illumination. This raises the possibility of bright photovoltaic solitons in LiNbO(3) .
Anastassiou
C
C
Shih
M F
MF
Mitchell
M
M
Chen
Z
Z
Segev
M
M