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Optimization of three-color laser field for the generation of single ultrashort attosecond pulse
Chu, Shih-I Liu, I-Lin Li, Peng-Cheng
Chu, Shih-I
Liu, I-Lin
Li, Peng-Cheng
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Abstract
We present an efficient and realizable scheme for the generation of an ultrashort single attosecond (as) pulse. The feasibility of such a scheme is demonstrated by solving accurately the time-dependent Schrödinger equation using the time-dependent generalized pseudospectral (TDGPS) method. This scheme involves the use of the optimization of the three-color laser fields. The optimized laser pulse is synthesized by three one-color laser pulses with proper relative phases. It can provide a longer acceleration time for the tunneling and oscillating electrons, and allows the electrons to gain more kinetic energy. We show that the plateau of high-order harmonic generation is extended dramatically and a broadband supercontinuum spectra is produced. As a result, an isolated 23 as pulse with a bandwidth of 163 eV can be obtained directly by superposing the supercontinuum harmonics near the cutoff region. We will show that such a metrology can be realized experimentally.
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This is the published version, also available here: http://dx.doi.org/10.1364/OE.19.023857.
Date
2011-11-09
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Optical Society of America
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Peng-Cheng Li, I-Lin Liu, and Shih-I Chu, "Optimization of three-color laser field for the generation of single ultrashort attosecond pulse," Opt. Express 19, 23857-23866 (2011) http://dx.doi.org/10.1364/OE.19.023857.