报告题目：Resonance in modulation instability from non-instantaneous nonlinearities
报 告 人：Ray-Kuang Lee（Institute of Photonics Technologies, National Tsing-Hua University, Taiwan）
报告时间：2018年1月16日（周二） 12:30
报告地点：校本部G309
邀请人： 张永平，申明
报告摘要：
To explore resonance phenomena in the nonlinear region, we show by experimental measurements and theoretical analyses that resonance happens in modulation instability (MI) from non-instantaneous nonlinearities in photorefractive crystals. With a temporally periodic modulation in the external bias voltage, corresponding to a modulation in the nonlinear strength, an enhancement in the visibility of MI at the resonant frequency is reported through spontaneous optical pattern formations. Modeled by such temporally periodic nonlinear driving force to the system, theoretical curves obtained from a nonlinear non-instantaneous Schr ?odinger equation give good agreement to experimental data. As MI is a universal signature of symmetry-breaking phenomena, our observation on the resonance in MI may provide a control on chaotic, solitary, and turbulence waves.
References:
[1] Chien-Chung Jeng, YuanYao Lin, Ray-Ching Hong, and Ray-Kuang Lee, Optical pattern transition from modulation to transverse instabilities in photorefractive crystals, Phys. Rev. Lett. 102, 153905 (2009).
[2] Chien-Chung Jeng, Yonan Su, Ray-Ching Hong, and Ray-Kuang Lee, Control modulation instability in photorefractive crystals by the intensity ratio of background to signal fields, Optics Express 23, 10266 (2015).
[3] Ming Shen, Yonan Su, Ray-Ching Hong, YuanYao Lin, Chien-Chung Jeng, Min-Feng Shih, and Ray-Kuang Lee, Observation of phase boundaries in spontaneous optical pattern formations, Phys. Rev. A 91, 023810 (2015).
[4] Ray-Ching Hong, Chun-Yan Lin, You-Lin Chuang, Chien-Ming Wu, Yonan Su, Jeng Yi Lee, Chien-Chung Jeng, Ming-Feng Shih, and Ray-Kuang Lee, Resonance in modulation instability from non-instantaneous nonlinearities, submitted to Physical Review Letters (2018).
