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首页> 外文期刊>Journal of Materials Research >Ultrafast dynamic reflectivity of vanadium pentoxide
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Ultrafast dynamic reflectivity of vanadium pentoxide

机译：五氧化二钒的超快动态反射率

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The ultrafast dynamic reflectivity of vanadium pentoxide is measured using 40 fs pulses from a self-mode-locked Ti:sapphire laser. The laser pulses excite acoustic vibrations at wave numbers of 145 and 103 cm~(-1). The amplitudes of the induced oscillations depend strongly on the orientation between the linear polarization of the laser pulses and the crystal axes, with the largest oscillations observed for an orientation of 45°. The higher-frequency oscillation is induced immediately upon arrival of the laser pulse, while the lower-frequency oscillation appears a few picoseconds later. The oscillations persist for approximately 10 ps after the arrival of the pulse. The oscillations are attributed to transverse acoustic modes propagating along the a-axis of the crystal.
机译：五氧化二钒的超快动态反射率是使用来自自锁模Ti：蓝宝石激光器的40 fs脉冲测量的。激光脉冲以145和103 cm〜（-1）的波数激发声振动。引起的振荡的幅度在很大程度上取决于激光脉冲的线性偏振和晶轴之间的取向，对于45°取向观察到最大的振荡。激光脉冲到达后立即引发高频振荡，而低频振荡则在几皮秒后出现。脉冲到达后，振荡持续约10 ps。振荡归因于沿晶体的a轴传播的横向声模。

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