Author/Authors :
Guo، نويسنده , , Hengchang and Jiang، نويسنده , , Hongbing and Luo، نويسنده , , Xiao-Le and Wu، نويسنده , , Chengyin and Guo، نويسنده , , Hongcang and Wang، نويسنده , , Xi and Yang، نويسنده , , Hong Ying Gong، نويسنده , , Qihuang and Wu، نويسنده , , Feipeng and Wang، نويسنده , , Tao and Shi، نويسنده , , Mengquan and Wu، نويسنده ,
Abstract :
Two-photon polymerization, initiated by 2,7-bis[[4-(dimethylamino)-phenyl] methylene]-cycloheptanone and 1,1′,2,2′-bis(o-chlorophenyl)-4,4′,5,5′-tetraphenyl-bisimidazole, was employed to fabricate refractive index-modulated holographic gratings by the interference of a femtosecond laser pulse at wavelength of 810 nm. The diffraction efficiency of the grating was up to 57% and the refractive index modulation reached 4.3×10−3 after thermal fixation with the film thickness of 40 μm. And dependence of the diffraction efficiency and refractive modulation on laser pulse energy was also investigated.
