Open AccessMulti-quantum-path interference in high harmonic generation driven by a chirped laser pulse
Author(s) -
Candong Liu,
Yi Zheng,
Zhinan Zhang,
Peng Liu,
Ruxin Li,
Zhizhan Xu
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.010319
Subject(s) - chirp , interference (communication) , physics , optics , high harmonic generation , laser , pulse (music) , quantum , harmonic , quantum mechanics , telecommunications , computer science , channel (broadcasting) , detector
We theoretically investigate the quantum-path interference during the high harmonic generation in argon and observe the multi-quantum- path-interference (MQPI) effect related to the chirp of driving laser pulse. We successfully identify the interference originated from four significantly contributing quantum paths in the interaction of "isolated" atom with the driving laser field. Moreover, the MQPI effect is further demonstrated beyond the single atom response by spatial filtering which is used for angle-selective detection of transmitted light when three-dimensional propagation is considered. It implies that the role of high-order electron returning trajectories during high harmonic generation can be observed in the experiment.