Modulation instability of light beam propagation near the supercollimation frequency in nonlinear photonic crystals |
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| Authors: | Binxian Zhuang Yuanjiang Xiang Anle Fang Shuangchun Wen |
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| Affiliation: | 1. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education , College of Information Science and Engineering, Hunan University , Changsha , China binxianzhuang@yahoo.com.cn;3. Key Laboratory for Micro/Nano-Optoelectronic Devices of Ministry of Education , College of Physics and Microelectronic Science, Hunan University , Changsha , 410082 , China;4. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education , College of Information Science and Engineering, Hunan University , Changsha , China |
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| Abstract: | The modulation instability (MI) of light beam propagation near the supercollimation frequency in nonlinear photonic crystals was investigated. The role of the nonlinear diffraction effect, merged as a result of nonlinear tuning of the equal-frequency contour curvature, in MI is particularly identified. It is found that the nonlinear diffraction effect tends to stimulate or suppress MI depending on the sign of the product of nonlinear diffraction and Kerr effects. Further analysis reveals that the MI and soliton phenomenon may be steered by the tunable supercollimation frequency in nonlinear photonic crystals. |
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| Keywords: | modulation instability nonlinear photonic crystal supercollimation effect nonlinear diffraction |
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