Control Modulation Instability through Periodically-Driving Voltages in Photorefractive Crystals
Yonan Su1*, Ray-Ching Hong1, Chien-Chung Jeng2, Ray-Kuang Lee1
1Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu, Taiwan
2Department of Physics, National Chung-Hsing University, Taichung, Taiwan
* presenting author:Yonan Su,
By introducing a modulation in time, we show theoretically and experimentally that spontaneous optical pattern formation can be controlled by a periodically-driving voltage. Counter-intuitively, in addition to the amplitude, relative phase of the driving voltage in the initial stage is found to play a role on the growth rate of modulation instabilities. Theoretical results on the control of modulation instability in photorefractive crystals give good agreement to experimental measurement.

Keywords: Photorefractive, modulation instability, pattern formation