Spatiotemporal optical modulation instability of coherent light in noninstantaneous nonlinear media.
We report on the theoretical derivation and experimental observation of spatiotemporal modulation instability (MI) of a coherent light beam in noninstantaneous nonlinear media. We obtain analytically the MI growth rate as a function of the spatial and temporal frequencies of the perturbation and the material response time. In the experiment, we observe that the varying speed of the MI patterns increases with the decreased material response time. We also observe that increasing the material response time can arrest the MI, agreeing with our theoretical derivation.
Shih
Ming-Feng
MF
Physics Department, National Taiwan University, Taipei, 106, Taiwan. mfshih@phys.ntu.edu.tw
Jeng
Chien-Chung
CC
Sheu
Fan-Wen
FW
Lin
Chao-Yin
CY