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Speed-dependent Voi...
Speed-dependent Voigt dispersion line-shape function : applicable to techniques measuring dispersion signals
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- Wang, Junyang (author)
- Umeå universitet,Institutionen för fysik
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- Ehlers, Patrick (author)
- Umeå universitet,Institutionen för fysik
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- Silander, Isak (author)
- Umeå universitet,Institutionen för fysik
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- Westberg, Jonas (author)
- Umeå universitet,Institutionen för fysik
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- Axner, Ove (author)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Washington : Optical Society of America, 2012
- 2012
- English.
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In: Journal of the Optical Society of America. B, Optical physics. - Washington : Optical Society of America. - 0740-3224 .- 1520-8540. ; 29:10, s. 2971-2979
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- An analytical expression for a Voigt dispersion line-shape function that incorporates speed-dependent effects (SDEs) on the collision broadening, applicable to spectroscopic techniques that measure dispersion signals, is presented. It is based upon a speed-dependent Voigt (SDV) model for absorption spectrometry that assumes that the molecular relaxation rate has a quadratic dependence on molecular speed. The expression is validated theoretically in the limit of small SDEs by demonstration that it reverts to the ordinary Voigt dispersion line-shape function and experimentally in a separate work by experiments performed by the noise-immune cavity-enhanced optical heterodyne molecular spectrometry technique. A comparison is given between the SDEs in the SDV absorption and dispersion line-shape functions. It is shown that both line shapes are affected significantly but differently by SDEs. The expression derived provides, for the first time to our knowledge, a possibility also for the techniques that measure dispersion signals to handle SDEs. (c) 2012 Optical Society of America
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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