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dc.contributor.authorChu, Shih-I
dc.contributor.authorLi, Peng-Cheng
dc.date.accessioned2014-12-02T17:27:37Z
dc.date.available2014-12-02T17:27:37Z
dc.date.issued2012-07-13
dc.identifier.citationChu, Shih-I & Li, Peng-Cheng. "Effects of macroscopic propagation on spectra of broadband supercontinuum harmonics and isolated-attosecond-pulse generation: Coherent control of the electron quantum trajectories in two-color laser fields." Phys. Rev. A 86, 013411 – Published 13 July 2012. http://dx.doi.org/10.1103/PhysRevA.86.013411.
dc.identifier.urihttp://hdl.handle.net/1808/15992
dc.descriptionThis is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.86.013411.
dc.description.abstractRecently it was shown that broadband supercontinuum harmonics can be produced from the long-trajectory electrons in the single-atom response by the coherent control of the electron trajectories through optimized two-color laser fields. Such supercontinuum harmonics can be superposed to generate an isolated sub-30-attosecond (as) pulse [Liu et al., Phys. Rev. A 84, 033414 (2011)]. In this paper, we investigate the effect of macroscopic propagation on the supercontinuum harmonic spectra and the subsequent attosecond-pulse generation of atomic hydrogen. The time-dependent Schrödinger equation is solved accurately and efficiently by means of the time-dependent generalized pseudospectral method. The effects of macroscopic propagation are investigated in near and far field by solving Maxwell's equation. The results show that the contribution of short-trajectory electron emission is increased when the macroscopic propagation is considered. However, the characteristics of the dominant long-trajectory electron emission (in the single-atom response case) are not changed, and an isolated 53 as pulse can be generated in the near field. Moreover, in the far field, the contribution of long-trajectory electron emission is still dominant for both on-axis and off-axis cases. As a result, an isolated 42 as pulse can be generated directly. Similar results are obtained when the atomic target position is changed. Therefore, the proposed method for the single ultrashort attosecond-pulse generation can be realized by means of the coherent control of the electron quantum paths in appropriately optimized two-color laser fields.
dc.publisherAmerican Physical Society
dc.titleEffects of macroscopic propagation on spectra of broadband supercontinuum harmonics and isolated-attosecond-pulse generation: Coherent control of the electron quantum trajectories in two-color laser fields
dc.typeArticle
kusw.kuauthorChu, Shih-I
kusw.kudepartmentChemistry
kusw.oastatusfullparticipation
dc.identifier.doi10.1103/PhysRevA.86.013411
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item meets KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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