CAJ | 학술논문

采用中心波长800 nm、脉宽30 fs的超短激光脉冲,通过飞秒光开关技术(Optical Kerr Shutter,OKS)对富勒烯有机-无机杂化材料的飞秒超快非线性特性进行了实验研究.获得270 fs的开关时间,所得的富勒烯有机-无机杂化材料的三阶非线性系数X~(3)约为4.5×10~(-4) esu,比C_(60)分子的三阶非线性系数X~(3)高一个数量级.通过实验测定的光克尔信号强度与激发光和探测光偏振方向夹角的依赖关系表明:30 fs的超短激光脉冲激发富勒烯有机-无机杂化材料的克尔信号主要是源于光诱导双折射效应,而非用200 fs的超短激光脉冲时来自瞬态栅的自衍射效应.
채용중심파장800 nm、맥관30 fs적초단격광맥충,통과비초광개관기술(Optical Kerr Shutter,OKS)대부륵희유궤-무궤잡화재료적비초초쾌비선성특성진행료실험연구.획득270 fs적개관시간,소득적부륵희유궤-무궤잡화재료적삼계비선성계수X~(3)약위4.5×10~(-4) esu,비C_(60)분자적삼계비선성계수X~(3)고일개수량급.통과실험측정적광극이신호강도여격발광화탐측광편진방향협각적의뢰관계표명:30 fs적초단격광맥충격발부륵희유궤-무궤잡화재료적극이신호주요시원우광유도쌍절사효응,이비용200 fs적초단격광맥충시래자순태책적자연사효응.
The ultrafast nonlinear optical properties of the fullerene-doped inorganic-organic hybrid materials are investigated by the femtosecond optical Kerr shutter (OKS) technique at wavelength of 800 nm. The OKS in the sample symmetrical with the full width at half maximum (FWHM) of 270 fs is gained. The non-resonant third-order optical susceptibility X~(3) of the C_(60)-doped inorganic-organic hybrid materials is measured to be about 4.5 × 10~(-14) esu, which is one order magnitude more than the values of X~(3) of C_(60) molecule. Measurements for the dependence of Kerr signals on the polarization angle between are pump and probe beams show that the Kerr signals induced by 30 fs pulse laser arose are mainly from the photoinduced birefringence effect and not from a laser-induced transient grating as observed when using a 200 fs pulse laser. So there is a little difference between the values of the third-order optical susceptibility X~(3) measured by using different laser durations, and the third-order optical susceptibility X~(3) of the fullerenedoped inorganic-organic hybrid materials measured by 30 fs pulse laser is a little smaller than that obtained by 200 fs pulse laser.