Diffusion-broadened line shape near a turning point

D. A. Shapiro; M. G. Stepanov

doi:10.1134/1.567829

Diffusion-broadened line shape near a turning point

D. A. Shapiro, M. G. Stepanov

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The absorption spectrum of a gas with a large Doppler width and soft collisions between particles is studied. The particles are assumed to have a nonlinear dependence of the resonance frequency on velocity. The shape of the narrow peak in the spectrum resulting from an extremum of this dependence is calculated analytically for the first time. In the absence of collisions it has a characteristic asymmetric shape. Collisions are shown to broaden the line and change its shape. The profile of the probe-field spectrum is obtained for a three-level system with the strong field at an adjacent transition. The components of the Autler-Townes doublet are found to spread and repel each other because of collisions.

Original language	English (US)
Pages (from-to)	29-35
Number of pages	7
Journal	JETP Letters
Volume	68
Issue number	1
DOIs	https://doi.org/10.1134/1.567829
State	Published - 1998
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1134/1.567829

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title = "Diffusion-broadened line shape near a turning point",

abstract = "The absorption spectrum of a gas with a large Doppler width and soft collisions between particles is studied. The particles are assumed to have a nonlinear dependence of the resonance frequency on velocity. The shape of the narrow peak in the spectrum resulting from an extremum of this dependence is calculated analytically for the first time. In the absence of collisions it has a characteristic asymmetric shape. Collisions are shown to broaden the line and change its shape. The profile of the probe-field spectrum is obtained for a three-level system with the strong field at an adjacent transition. The components of the Autler-Townes doublet are found to spread and repel each other because of collisions.",

author = "Shapiro, {D. A.} and Stepanov, {M. G.}",

note = "Funding Information: We thank E. V. Podivilov for stimulating discussions, and A. I. Chernykh for valuable advice on numerical methods. The present paper was partially supported by RFBR (#96-02-19052, #96-15-96642), R&D Programs {\textquoteleft}{\textquoteleft}Optics. Laser Physics{\textquoteright}{\textquoteright} (#1.53), {\textquoteleft}{\textquoteleft}Fundamental Spectroscopy{\textquoteright}{\textquoteright} (#08.02.32), and the Soros Students program (M S, s97-215).",

year = "1998",

doi = "10.1134/1.567829",

language = "English (US)",

volume = "68",

pages = "29--35",

journal = "JETP Letters",

issn = "0021-3640",

publisher = "Pleiades Publishing",

number = "1",

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TY - JOUR

T1 - Diffusion-broadened line shape near a turning point

AU - Shapiro, D. A.

AU - Stepanov, M. G.

N1 - Funding Information: We thank E. V. Podivilov for stimulating discussions, and A. I. Chernykh for valuable advice on numerical methods. The present paper was partially supported by RFBR (#96-02-19052, #96-15-96642), R&D Programs ‘‘Optics. Laser Physics’’ (#1.53), ‘‘Fundamental Spectroscopy’’ (#08.02.32), and the Soros Students program (M S, s97-215).

PY - 1998

Y1 - 1998

N2 - The absorption spectrum of a gas with a large Doppler width and soft collisions between particles is studied. The particles are assumed to have a nonlinear dependence of the resonance frequency on velocity. The shape of the narrow peak in the spectrum resulting from an extremum of this dependence is calculated analytically for the first time. In the absence of collisions it has a characteristic asymmetric shape. Collisions are shown to broaden the line and change its shape. The profile of the probe-field spectrum is obtained for a three-level system with the strong field at an adjacent transition. The components of the Autler-Townes doublet are found to spread and repel each other because of collisions.

AB - The absorption spectrum of a gas with a large Doppler width and soft collisions between particles is studied. The particles are assumed to have a nonlinear dependence of the resonance frequency on velocity. The shape of the narrow peak in the spectrum resulting from an extremum of this dependence is calculated analytically for the first time. In the absence of collisions it has a characteristic asymmetric shape. Collisions are shown to broaden the line and change its shape. The profile of the probe-field spectrum is obtained for a three-level system with the strong field at an adjacent transition. The components of the Autler-Townes doublet are found to spread and repel each other because of collisions.

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DO - 10.1134/1.567829

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SP - 29

EP - 35

JO - JETP Letters

JF - JETP Letters

IS - 1

ER -

Diffusion-broadened line shape near a turning point

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