Electron density changes and high harmonics generation in H2 molecule under intense laser fields |
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Authors: | A Wadehra B M Deb |
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Institution: | (1) Department of Chemistry, Panjab University, 160014 Chandigarh, India;(2) S.N. Bose National Centre for Basic Sciences, J.D. Block, Sector III, Salt Lake, 700098 Kolkata, India and Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, 560064 Bangalore, India |
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Abstract: | Under interaction with a high-intensity laser field, the real-time
femtosecond dynamics of the electron density in the H2
molecule has been studied quantum mechanically. For this purpose, a
time-dependent generalized nonlinear Schr?dinger equation of motion,
developed earlier in our laboratory by combining density functional theory
and quantum fluid dynamics in real space, is solved numerically at the
equilibrium internuclear distance of the molecule. By employing various
time-dependent calculated properties as probes, information and insight are
obtained about the phenomena of excitation, ionization, bond-softening,
dipole formation and high-harmonics generation. The present approach goes
beyond the linear response formalism. |
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Keywords: | 33 80 -b Photon interactions with molecules 42 50 Hz Strong-field excitation of optical transitions in quantum systems multiphoton processes dynamic Stark shift 42 65 Ky Frequency conversion harmonic generation including higher-order harmonic generation |
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