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Femtosecond laser-induced birefringence and transient grating in lead(II) phthalocyanine-doped hybrid silica gel glasses |
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| Authors: | Qing Yang Tao Chen Jinhai Si Tianxing Lin Xun Hou Guodong Qian |
| Institution: | a Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronics and Information Engineering, Xi’an Jiaotong University, Xianing-xilu 28, Xi’an 710049, China b Shanxi Key Laboratory of Information, Photonic Technique, School of Electronics and Information Engineering, Xi’an Jiaotong University, Xianing-xilu 28, Xi’an 710049, China c Department of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310035, China |
| Abstract: | Ultrafast nonlinear optical properties of lead(II) phthalocyanine (PbPc)-doped silica gel glasses were investigated using a femtosecond optical Kerr shutter (OKS) setup at wavelength of 800 nm. The nonlinear response time of the PbPc-doped silica gel glasses was measured to be less than 90 fs. Measurements for the dependence of Kerr signals on the polarization angle between pump and probe beams showed that the Kerr signals induced by 30-fs pulses arose mainly from photoinduced birefringence effect and not from a laser-induced transient grating as observed when using a 200-fs pulse laser. |
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