Absorption of Ultrashort Laser Pulses by Diatomic Molecules

Journal Article · Sat Dec 15 04:00:00 EST 2018 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776118120026· OSTI ID:22917843

Lisitsa, V. S.; Yakovets, A. V. ^[1]

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1. Moscow Institute of Physics and Technology (State University) (Russian Federation)

The absorption of ultrashort laser pulses by diatomic CO and HF molecules is studied theoretically. The probability of absorption in the total pulse action time and its dependence on the pulse duration and carrier frequency are calculated. In contrast to atomic systems, where the finite pulse duration effects are noticeable on time scales of the order of femtoseconds, these effects in molecular structures manifest themselves on time scales of the order of picoseconds. In this case, the vibrational–rotational structure of molecular transitions plays a significant role. The results of our calculations of the vibrational–rotational spectra for the absorption of ultrashort laser pulses by diatomic CO and HF molecules are presented. The transition from the nonlinear dependence of the absorption probability for short pulse durations to the standard dependence at long pulse durations corresponding to the transition probabilities per unit time is investigated.

• OSTI ID: 22917843
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 127; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
CARBON MONOXIDE
HYDROFLUORIC ACID
LASER RADIATION
MOLECULAR STRUCTURE
MOLECULES
NONLINEAR PROBLEMS
PROBABILITY
SPECTRA