期刊
CHINESE PHYSICS B
卷 24, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/24/5/054210
关键词
surface plasmon resonances; high-order harmonics; attosecond pulse; 27th harmonic pulse
资金
- National Natural Science Foundation of China [11404153, 11175076, 11135002, 11405077]
- Fundamental Research Funds for the Central Universities of China [lzujbky-2014-10, lzujbky-2014-13, lzujbky-2014-14]
We theoretically investigate high-order harmonic generation in a two-color multi-cycle inhomogeneous field combined with a 27th harmonic pulse. By considering a bowtie-shaped gold nanostructure, the spatiotemporal profiles of enhanced plasmonic fields are obtained by solving the Maxwell equation using finite-domain time-difference method. Based on quantum-mechanical and classical models, the effect of 27th harmonic pulse, temporal profile of enhanced plasmonic field and inhomogeneity on supercontinuum generation are analyzed and discussed. As a result, broadband supercontinuum can be generated from our approach with optimized gap size of nanostructure. Moreover, these results are not sensitively dependent on the relative phase in the two-color field.
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