Unveiling the mechanism of wave-front distortion of superfluorescent pulses
Unveiling the mechanism of wave-front distortion of superfluorescent pulses
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DOI：
10.1103/physreva.100.041803
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发表时间：
2019-10
影响因子：
2.9
通讯作者：
K. Kitano;H. Maeda
中科院分区：
文献类型：
--
作者：
K. Kitano;H. Maeda
We investigated the transverse properties of 420-nm yoked superfluorescence (YSF) emitted from the atomic vapor of rubidium by driving thetwo-photon transition with an ultrashort laser pulse. From the observed interferograms of the superfluorescent pulses, we derived both the amplitude and phase properties of their electric fields. By increasing the pump-pulse intensity, the spatial profile of the 420-nm YSF changed from a central bright spot into a ring-shaped radial profile, accompanied by a simultaneous distortion of the wave front. This behavior can be explained by considering the intensity-dependent phase shifts of thewave packets during the excitation process, which was further imprinted to the 420-nm YSF wave front. The single-shot experiments enabled us to clarify the locally coherent regions of the 420-nm YSF as well as their stochastic feature.
