本文理论研究了自散焦LiNbO3晶体中非相干亮光伏孤子的形成机理及其动态演化特性。研究发现,通过加载背景光的方法能够实现LiNbO3晶体由自散焦向自聚焦的转换并形成亮空间孤子。以LiNbO3晶体为例,给出了折射率空间分布与光伏常数比K 之...本文理论研究了自散焦LiNbO3晶体中非相干亮光伏孤子的形成机理及其动态演化特性。研究发现,通过加载背景光的方法能够实现LiNbO3晶体由自散焦向自聚焦的转换并形成亮空间孤子。以LiNbO3晶体为例,给出了折射率空间分布与光伏常数比K 之间的关系,给出了亮光伏孤子的存在曲线。进一步采用相干密度法理论分析了非相干亮光伏孤子在LiNbO3晶体中的传输特性,并利用分步傅里叶算法数值模拟了K 值对孤子形成的影响。此外,非相干亮光伏孤子的形成还受强度比值 r T 和光源角功率谱宽度θ0 的影响。通过加载背景光的方法可以实现无偏压条件下亮暗孤子的切换,这对基于孤子的全光器件研究提供可靠性参考。展开更多
The third-order nonlinear optical(NLO)materials with stimuli-responsive properties have received extraordinary attention due to their controllable photophysical properties.In this work,two attractive metal complexes t...The third-order nonlinear optical(NLO)materials with stimuli-responsive properties have received extraordinary attention due to their controllable photophysical properties.In this work,two attractive metal complexes third-order NLO switches,which are far superior to congeneric optical switches in terms of their performance conversion,versatility,and fast response,were successfully designed and synthesized.The test of their third-order NLO properties proves that the metal complexes exhibit reverse saturable absorption and self-defocusing refraction.After light irradiation,the third-order NLO behavior turns quickly into self-focusing refraction.The relation between the molecular structures and the third-order NLO properties was investigated via1H nuclear magnetic resonance and ultraviolet-visible absorption.The results show that the metal ions have a significant influence on the NLO behavior and reveal the origin of third-order NLO properties via Z-scan determinations,pump-probe technology,and density functional theory calculations.These metal complexes can be used as third-order NLO switches with excellent fatigue resistance and broaden the application range of third-order NLO materials with adjustable performances.展开更多
文摘本文理论研究了自散焦LiNbO3晶体中非相干亮光伏孤子的形成机理及其动态演化特性。研究发现,通过加载背景光的方法能够实现LiNbO3晶体由自散焦向自聚焦的转换并形成亮空间孤子。以LiNbO3晶体为例,给出了折射率空间分布与光伏常数比K 之间的关系,给出了亮光伏孤子的存在曲线。进一步采用相干密度法理论分析了非相干亮光伏孤子在LiNbO3晶体中的传输特性,并利用分步傅里叶算法数值模拟了K 值对孤子形成的影响。此外,非相干亮光伏孤子的形成还受强度比值 r T 和光源角功率谱宽度θ0 的影响。通过加载背景光的方法可以实现无偏压条件下亮暗孤子的切换,这对基于孤子的全光器件研究提供可靠性参考。
基金the National Natural Science Foundation of China(21671174 and U1904172)the Zhongyuan Thousand Talents Project,the Natural Science Foundation of Henan Province(182300410008)the Open Foundation of Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials,Guangxi University(2019GXYSOF12).
文摘The third-order nonlinear optical(NLO)materials with stimuli-responsive properties have received extraordinary attention due to their controllable photophysical properties.In this work,two attractive metal complexes third-order NLO switches,which are far superior to congeneric optical switches in terms of their performance conversion,versatility,and fast response,were successfully designed and synthesized.The test of their third-order NLO properties proves that the metal complexes exhibit reverse saturable absorption and self-defocusing refraction.After light irradiation,the third-order NLO behavior turns quickly into self-focusing refraction.The relation between the molecular structures and the third-order NLO properties was investigated via1H nuclear magnetic resonance and ultraviolet-visible absorption.The results show that the metal ions have a significant influence on the NLO behavior and reveal the origin of third-order NLO properties via Z-scan determinations,pump-probe technology,and density functional theory calculations.These metal complexes can be used as third-order NLO switches with excellent fatigue resistance and broaden the application range of third-order NLO materials with adjustable performances.
