Stimulated rotational Raman generation controlled by strongly driven vibrational coherence in molecular deuterium

Journal Article · Thu Feb 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.022515· OSTI ID:20982114

Burzo, A M; Chugreev, A V; Sokolov, A V ^[1]

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1. Department of Physics and Institute for Quantum Studies, Texas A and M University, College Station, Texas 77843-4242 (United States)

We report an experimental observation of simultaneous rotational and vibrational collinear Raman generation in low pressure cooled deuterium gas, with only two narrow-band laser pulses applied at the input of the molecular cell. Only the fundamental vibrational transition Q{sub 1} (0) is driven strongly in this experiment. However, in addition to efficient vibrational Raman generation we observe generation of a large number of rotational sidebands (more than 100) corresponding to S{sub 0} (0) transition. We notice that fine-tuning of the frequency difference of the driving fields near the vibrational Raman resonance changes dramatically the aspects of the generated spectrum and the efficiency of rotational generation: from complete suppression of a self-starting stimulated rotational Raman generation to a strong enhancement of two orders of magnitude. We conduct a numerical analysis that allows us to attribute this behavior to quantum interference among the probability amplitudes of the three molecular states involved.

• OSTI ID: 20982114
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
DEUTERIUM
EFFICIENCY
INTERFERENCE
LASER RADIATION
NUMERICAL ANALYSIS
PROBABILITY
PULSES
RAMAN SPECTRA
RESONANCE
ROTATIONAL STATES
TUNING
VIBRATIONAL STATES