Slowdown of group velocity of light by means of phase coupling in photorefractive two-wave mixing.
We show theoretically that the group velocity of light can be slowed down by means of phase coupling in the photorefractive two-wave mixing process. It is shown that the group velocity of light propagating in a photorefractive material could be significantly reduced because of a steep variation of the phase-coupling coefficient with respect to the angular frequency difference between two coupling beams in a two-wave mixing process. The results for the case of a photorefractive Bi12SiO20 crystal are presented and discussed in detail.
Photonics Research Center, College of Physical Science, Nankai University, Tianjin, 300071, China. gqzhang@nankai.edu.cn
Guoquan
G
Zhang
Rong
R
Dong
Fang
F
Bo
Jingjun
J
Xu