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Type: Journal article
Title: Anomalous two-photon spectral features in warm rubidium vapor
Author: Perrella, C.
Light, P.
Milburn, T.
Kielpinski, D.
Stace, T.
Luiten, A.
Citation: Physical Review A: Atomic, Molecular and Optical Physics, 2016; 94(3):033403-1-033403-8
Publisher: American Physical Society
Issue Date: 2016
ISSN: 1050-2947
Statement of
C. Perrella, P. S. Light, T. J. Milburn, D. Kielpinski, T. M. Stace and A. N. Luiten
Abstract: We report observation of anomalous fluorescence spectral features in the environs of a two-photon transition in a rubidium vapor when excited with two different wavelength lasers that are both counterpropagating through the vapor. These features are characterized by an unusual trade-off between the detunings of the driving fields. Three different hypothetical processes are presented to explain the observed spectra: a simultaneous three-atom and four-photon collision, a four-photon excitation involving a light field produced via amplified spontaneous emission, and population pumping perturbing the expected steady-state spectra. Numerical modeling of each hypothetical process is presented, supporting the population pumping process as the most plausible mechanism.
Rights: ©2016 American Physical Society
DOI: 10.1103/PhysRevA.94.033403
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