Rotation commensurate echo of asymmetric molecules—Molecular fingerprints in the time domain

Journal Article · Mon Dec 29 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905205· OSTI ID:22395602

Kubarev, V. V. ^[1]; Koshlyakov, P. V. ^[2]

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1. Budker Institute of Nuclear Physics, Novosibirsk 630090 (Russian Federation)
2. Institute of Chemical Kinetics and Combustion, Novosibirsk 630090 (Russian Federation)

Using the pulses of terahertz free electron laser and ultra-fast Schottky diode detectors, we observed the coherent transients within a free induction decay of gaseous nitrogen dioxide NO{sub 2}. The laser excited different sub-bands of rotation spectra of NO{sub 2} containing about 50–70 lines. The free induction signal continued more than 30 ns and consisted of many echo-like bursts duration about 0.2 ns. Unlike the similar effect observed previously for linear and symmetric top molecules, the sequence of echo bursts is not periodic. The values for delay of individual echo are stable, and the set of these delays can be considered as a “molecular fingerprint” in the time domain.

• OSTI ID: 22395602
• Journal Information: Applied Physics Letters, Vol. 105, Issue 26; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
ELECTROMAGNETIC PULSES
FREE ELECTRON LASERS
LASER RADIATION
MOLECULES
NITROGEN DIOXIDE
PERIODICITY
PHOTON-MOLECULE COLLISIONS
ROTATION
ROTATIONAL STATES
SCHOTTKY BARRIER DIODES
SYMMETRY
TRANSIENTS