Manela Ofer, Bartal Guy, Segev Mordechai, Buljan Hrvoje
Department of Physics and Solid State Institute, Technion, Haifa 32000, Israel.
Opt Lett. 2006 Aug 1;31(15):2320-2. doi: 10.1364/ol.31.002320.
We show that two Bloch modes launched into a nonlinear photonic lattice evolve into a comb or a supercontinuum of spatial frequencies, exhibiting a sensitive dependence on the difference between the quasi-momenta of the two initially excited modes. This phenomenon results from four-wave mixing combined with exchanges of momentum between the optical field and the lattice.
我们表明，进入非线性光子晶格的两种布洛赫模式会演变成空间频率梳或超连续谱，对最初激发的两种模式的准动量之差表现出敏感的依赖性。这种现象是由四波混频与光场和晶格之间的动量交换共同导致的。
