Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam [software]

Hughes, Ifan G (Durham University, UK); Keaveney, James (Durham University, UK)

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Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam

Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam [software] Open Access

There is extensive use of monochromatic lasers to select atoms with a narrow range of velocities in many atomic-physics experiments. For the commonplace situation of the inhomogeneous Doppler-broadened (Gaussian)linewidth exceeding the homogeneous (Lorentzian) natural linewidth by typically two orders of magnitude, a substantial narrowing of the velocity class of atoms interacting with the light can be achieved. However this is not always the case, and here we show that for a certain parameter regime there is essentially no selection---all of the atoms interact with the light in accordance with the velocity probability density. An explanation of this effect is provided, emphasizing the importance of the long tail of the constituent Lorentzian distribution in a Voigt profile.

Descriptions

Resource type: Software
Contributors: Creator: Keaveney, James ¹
Creator: Hughes, Ifan G ¹
Contact person: Hughes, Ifan G ¹

¹ Durham University, UK
Funder: Engineering and Physical Sciences Research Council
Research methods: A python code was generated to study the velocity dependence of the absorption coefficient, and plot all the figures.
Other description: Requires Python 2.7 or newer.
Keyword: Laser spectroscopy
velocity selection
Doppler broadening
Voigt profile
Subject
Location
Language
Cited in
Identifier: ark:/32150/r2rv042t058
doi:10.15128/r2rv042t058
Publisher: Durham University
Date Created: 2017-02-17

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User S. Palucha has updated Code to produce figures in "Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam"	over 7 years ago
User S. Palucha has updated Code to produce figures in "Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam"	over 7 years ago
User S. Palucha has added a new version of Code to produce figures in "Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam"	over 7 years ago
User S. Palucha has updated Code to produce figures in "Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam"	over 7 years ago
User S. Palucha has updated Code to produce figures in "Velocity selection in a Doppler-broadened ensemble of atoms interacting with a monochromatic laser beam"	over 7 years ago