Anomalous photoelectron spectrum caused by finite interaction time in few-cycle xuv laser pulses - Physics > OpticsReportar como inadecuado




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Abstract: With the development of laser technology, pulse length enters the opticalcycle regime and hence the interaction time between laser pulse and atomsbecomes prominent. We investigate this problem in this Letter through thephotoelectron spectrum of hydrogen atom in few-cycle xuv laser pulses. Bysolving one-dimensional time-dependent Schr\-odinger equation, we find that dueto the insufficient interaction time, the electron can not gain enough energyfrom optical field when escaping the bind of the nuclear and then theabnormality appears in the photoelectron spectrum: the peak of photoelectronspectrum shows red shift compared with the well-known Einstein photo-electriceffect formula. The shift becomes large as the pulse duration decreases.



Autor: Yang Xiang, Yueping Niu, Yihong Qi, Shangqing Gong

Fuente: https://arxiv.org/







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