---
_id: '2196'
abstract:
- lang: eng
text: We evaluate the shifts imparted to vibrational and rotational levels of a
linear molecule by a nonresonant laser field at intensities of up to 10 12 W/cm2.
Both types of shift are found to be either positive or negative, depending on
the initial rotational state acted upon by the field. An adiabatic field-molecule
interaction imparts a rotational energy shift which is negative and exceeds the
concomitant positive vibrational shift by a few orders of magnitude. The rovibrational
states are thus pushed downward in such a field. A nonresonant pulsed laser field
that interacts nonadiabatically with the molecule is found to impart rotational
and vibrational shifts of the same order of magnitude. The nonadiabatic energy
transfer occurs most readily at a pulse duration which amounts to about a tenth
of the molecule's rotational period and vanishes when the sudden regime is attained
for shorter pulses. We applied our treatment to the much-studied 87Rb2 molecule
in the last bound vibrational levels of its lowest singlet and triplet electronic
states. Our calculations indicate that 15 and 1.5 ns laser pulses of an intensity
in excess of 5 × 109 W/cm2 are capable of dissociating the molecule due to the
vibrational shift. Lesser shifts can be used to fine-tune the rovibrational levels
and thereby affect collisional resonances by the nonresonant light. The energy
shifts due to laser intensities of 109 W/cm2 may be discernible spectroscopically,
with a 10 MHz resolution.
author:
- first_name: Mikhail
full_name: Mikhail Lemeshko
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Břetislav
full_name: Friedrich, Břetislav
last_name: Friedrich
citation:
ama: Lemeshko M, Friedrich B. Fine-tuning molecular energy levels by nonresonant
laser pulses. Journal of Physical Chemistry A. 2010;114(36):9848-9854.
doi:10.1021/jp1032299
apa: Lemeshko, M., & Friedrich, B. (2010). Fine-tuning molecular energy levels
by nonresonant laser pulses. Journal of Physical Chemistry A. American
Chemical Society. https://doi.org/10.1021/jp1032299
chicago: Lemeshko, Mikhail, and Břetislav Friedrich. “Fine-Tuning Molecular Energy
Levels by Nonresonant Laser Pulses.” Journal of Physical Chemistry A. American
Chemical Society, 2010. https://doi.org/10.1021/jp1032299.
ieee: M. Lemeshko and B. Friedrich, “Fine-tuning molecular energy levels by nonresonant
laser pulses,” Journal of Physical Chemistry A, vol. 114, no. 36. American
Chemical Society, pp. 9848–9854, 2010.
ista: Lemeshko M, Friedrich B. 2010. Fine-tuning molecular energy levels by nonresonant
laser pulses. Journal of Physical Chemistry A. 114(36), 9848–9854.
mla: Lemeshko, Mikhail, and Břetislav Friedrich. “Fine-Tuning Molecular Energy Levels
by Nonresonant Laser Pulses.” Journal of Physical Chemistry A, vol. 114,
no. 36, American Chemical Society, 2010, pp. 9848–54, doi:10.1021/jp1032299.
short: M. Lemeshko, B. Friedrich, Journal of Physical Chemistry A 114 (2010) 9848–9854.
date_created: 2018-12-11T11:56:16Z
date_published: 2010-09-16T00:00:00Z
date_updated: 2021-01-12T06:55:55Z
day: '16'
doi: 10.1021/jp1032299
extern: 1
intvolume: ' 114'
issue: '36'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1004.1742
month: '09'
oa: 1
page: 9848 - 9854
publication: Journal of Physical Chemistry A
publication_status: published
publisher: American Chemical Society
publist_id: '4777'
quality_controlled: 0
status: public
title: Fine-tuning molecular energy levels by nonresonant laser pulses
type: journal_article
volume: 114
year: '2010'
...