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Synthesis and Three-photon Induced Nonlinear Properties of a Novel Organic Chromophore

Chinese Chemical Letters 2005年第8期16卷 1093-1096页

作者： Fu Quan GUO Jun YANG Qi Jin ZHANG Hai MING structureresearch laboratory University of Science and Technology of China Hefei 230026 Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 Department of Physics University-of Science and Technology of China Hefei 230026

A novel organic chromophore 4, 4＇-bis（9-carbazyl-trans-styryl）-biphenyl （BCSBP） has been synthesized and characterized by IHNMR and elemental analysis. Three-photon absorption（3PA） induced upconvention fluorescence was observed and large 3PA cross section as high as 10^-74 cm^6 s^2 was obtained for nanosecond laser pulses at 1064 nm from optical limiting measurements.

关键词： Carbazole three-photon absorption upconvention fluorescence optical limiting.

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An all-optical modulator based on a stereo graphene–microfiber structure

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Light(Science & Applications) 2015年第1期4卷 42-46页

作者： Jin-Hui Chen Bi-Cai Zheng Guang-Hao Shao Shi-Jun Ge Fei Xu Yan-Qing Lu National laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

An in-line,all-optical fiber modulator based on a stereo graphene–microfiber structure(GMF)utilizing the lab-on-rod technique was demonstrated in this *** to its unique spring-like geometry,an ultra-long GMF interaction can be achieved,and a modulation depth of,7.5 dB(,2.5 dB)and a modulation efficiency of,0.2 dB mW^(-1)(,0.07 dB mW^(-1))were demonstrated for two polarization *** modulation depth and modulation efficiency are more than one order of magnitude larger than those of other graphene–microfiber hybrid all-optical modulators,although at the cost of a higher insertion *** further optimizing the transferring and cleaning process,the upper limit of the modulation depth is mainly determined by the loss from the intrinsic absorption,which depends on the light–graphene ***,the modulator can quickly switch between the on-state and the off-state with a theoretically maximized modulation depth of tens of *** modulator is compatible with the current fiber-optic communication systems and may be applied in the near future to meet the impending need for ultrafast optical signal processing.

关键词： graphene microfiber optical modulation polarization

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