Abstract

An efficient method of producing KeV single-attosecond pulses (SAPs) is proposed and investigated through the combination of a multi-cycle two-color mid-infrared field and a few-cycle near-infrared field in a metal nanostructure. It is found that by properly controlling the carrier envelope phases (CEPs) and delay time of the three-color field, not only can the quantum path of the harmonic emission be controlled, but the harmonic yield can also be enhanced by 2 orders of magnitude, leading to a high-intensity supercontinuum with contribution from only one harmonic emission event. Further, with the introduction of the inhomogeneous effect of the laser field, the harmonics emitted at the higher orders that generate SAPs occur only at one side of the region inside the nanostructure. As a result, not only can the harmonic cutoff be extended, but the modulations of the harmonics can also be decreased, showing a supercontinuum with a cutoff in the KeV region. Finally, by selecting the generated harmonics, a series of sub-35-attosecond pulses in the extreme ultraviolet (XUV) or the x-ray region can be produced. Particularly when superposing the harmonics around the cutoff region, a KeV-SAP as short as 34 attoseconds can be obtained.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Timing analysis of infrared-driven high-order harmonic generation with above-ionization attosecond pulses

Han Chieh Lee and Tsin Fu Jiang
J. Opt. Soc. Am. B 30(5) 1294-1302 (2013)

Carrier-envelope phase-dependent molecular high-order harmonic generation from H2+ in a multi-cycle regime

Baoning Wang, Lixin He, Hua Yuan, Qingbin Zhang, Pengfei Lan, and Peixiang Lu
Opt. Express 26(25) 33440-33452 (2018)

Optimization of three-color laser field for the generation of single ultrashort attosecond pulse

Peng-Cheng Li, I-Lin Liu, and Shih-I Chu
Opt. Express 19(24) 23857-23866 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription