Inhibition of light tunneling in waveguide arrays.
We report the observation of almost perfect light tunneling inhibition at the edge and inside laser-written waveguide arrays due to band collapse. When the refractive index of the guiding channels is harmonically modulated along the propagation direction and out-of-phase in adjacent guides, light is trapped in the excited waveguide over a long distance due to resonances. The phenomenon can be used for tuning the localization threshold power.
Szameit
A
A
Institute of Applied Physics, Friedrich-Schiller-University Jena, 07743 Jena, Germany.
Kartashov
Y V
YV
Dreisow
F
F
Heinrich
M
M
Pertsch
T
T
Nolte
S
S
Tünnermann
A
A
Vysloukh
V A
VA
Lederer
F
F
Torner
L
L