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Molecular-bond hardening and dynamics of molecular stabilization and trapping in intense laser pulses
Chu, Shih-I ; Yao, Guanhua
Chu, Shih-I
Yao, Guanhua
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Abstract
We extend our previous study [Chem. Phys. Lett. 197, 413 (1992)] of the molecular stabilization in intense laser fields by considering the dynamical behavior of the H+2 molecules in intense femtosecond short laser pulses at 775 nm. Significant stabilization and population trapping of high-lying vibrational states and chemical bond hardening are predicted for both continuous-wave (cw) lasers and short laser pulses. While the intensity dependences of the laser-induced stabilization are essentially the same for both cases, the detailed wave-packet localization dynamics is quite different. The correlation of the time-dependent dynamics with the time-independent Floquet complex quasienergy results, the probability for localization, the pulse-width dependence of molecular stabilization, the proton kinetic-energy spectrum, as well as the contrary dynamical response of low- and high-lying states, are studied at length for intense short laser pulses. In addition, the dynamic origin of ‘‘bond-softening’’ (for low-lying vibrational states) and ‘‘bond-hardening’’ (for high-lying vibrational states) effects in intense laser fields are explored.
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This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.48.485.
Date
1993-07-01
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American Physical Society
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Yao, Guanhua & Chu, Shih-I. "Molecular-bond hardening and dynamics of molecular stabilization and trapping in intense laser pulses." Phys. Rev. A 48, 485 – Published 1 July 1993. http://dx.doi.org/10.1103/PhysRevA.48.485."