Transient Dynamics of Excited States and Nonlinear Optical Properties of InP Nanoparticles
LI Dan1,YANG He-qing2,LIANG Chun-jun1,QIAN Shi-xiong3
1. Department of Physics, Beijing Jiaotong University, Beijing 100044, China 2. School of Chemistry and Materials Science, Shanxi Normal University, Xi′an 710062, China 3. Department of Physics, Fudan University, Shanghai 200433, China
Abstract：The decay curves of the emission at different wavelength were measured. One nanosecond of transition lifetime of interband was obtained. The transient dynamics of InP nanoparticles was investigated by one color femtosecond pump-probe method at the wavelength of 800 nm. The experimental result shows that the saturation of exciton resonance results in photo-bleaching at 800 nm The decay process of the bleaching includes two components, i.e. the fast one from free carries scattering and the slow one from trapped carriers scattering. The nonlinear optical properties of InP nanoparticles were investigated by using femtosecond optical Kerr effect. The magnitude of χ3 for InP nanoparticles embedded in SiO2 sol-gel glass was calculated, and its origin was analyzed.
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