Spatial frequency combs and supercontinuum generation in one-dimensional photonic lattices.
We experimentally demonstrate the formation of spatial supercontinuum and of spatial frequency combs in nonlinear photonic lattices. This process results from multiple four-wave mixing initiated by launching two Floquet-Bloch modes into a one-dimensional lattice. The dynamics of the waves is sensitively dependent on the transverse momentum difference between the two initial modes: when this momentum difference is commensurable with the lattice momentum the waves evolve into a frequency comb, whereas when it is incommensurable the waves evolve into a supercontinuum of spatial frequencies.
Dong
Rong
R
Institute of Physics and Physical Technologies, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
Rüter
Christian E
CE
Kip
Detlef
D
Manela
Ofer
O
Segev
Mordechai
M
Yang
Chengliang
C
Xu
Jingjun
J