TY - JOUR

T1 - Influence of Free Motion of Atoms on Atomic Density-Dependent Effects in Nonlinear Laser Spectroscopy of Resonant Gas Media

AU - Yudin, V. I.

AU - Taichenachev, A. V.

AU - Basalaev, M. Yu

AU - Prudnikov, O. N.

AU - Pal’chikov, V. G.

AU - Zanon-Willette, T.

AU - Bagayev, S. N.

N1 - The work was supported by the Russian Science Foundation (project no. 22-72-10096). V.I. Yudin acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation (project no. FSUS-2020-0036). Публикация для корректировки.

PY - 2023/3

Y1 - 2023/3

N2 - We develop a nonlinear theory of propagation of a monochromatic light wave in a gas of two-level atoms under the condition of inhomogeneous Doppler lineshape broadening, while considering a self-consistent solution of the Maxwell–Bloch equations in the mean-field approximation using a single atom density matrix formalism. Our approach shows a significant deformation of the Doppler resonant lineshape (shift, asymmetry), which depends on the atomic density. These effects are a consequence of only the free motion of atoms in a gas and is not associated with interatomic interaction. In particular, the frequency shift of the field-linear contribution to the transmission signal is more than an order of magnitude greater than the shift due to the interatomic dipole–dipole interaction, and the first nonlinear correction has an even stronger deformation, which exceeds the effect of the interatomic interaction by three orders of magnitude. The found effects caused by the free motion of atoms require a significant revision of the existing picture of spectroscopic effects, which depend on the atomic density in a gas.

AB - We develop a nonlinear theory of propagation of a monochromatic light wave in a gas of two-level atoms under the condition of inhomogeneous Doppler lineshape broadening, while considering a self-consistent solution of the Maxwell–Bloch equations in the mean-field approximation using a single atom density matrix formalism. Our approach shows a significant deformation of the Doppler resonant lineshape (shift, asymmetry), which depends on the atomic density. These effects are a consequence of only the free motion of atoms in a gas and is not associated with interatomic interaction. In particular, the frequency shift of the field-linear contribution to the transmission signal is more than an order of magnitude greater than the shift due to the interatomic dipole–dipole interaction, and the first nonlinear correction has an even stronger deformation, which exceeds the effect of the interatomic interaction by three orders of magnitude. The found effects caused by the free motion of atoms require a significant revision of the existing picture of spectroscopic effects, which depend on the atomic density in a gas.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85158117118&origin=inward&txGid=10f0b30d6c251859051bc99abc904125

UR - https://www.mendeley.com/catalogue/aa1bd02b-e7e7-3a2c-9105-1d1505509943/

U2 - 10.1134/S0021364023600222

DO - 10.1134/S0021364023600222

M3 - Article

VL - 117

SP - 414

EP - 421

JO - JETP Letters

JF - JETP Letters

SN - 0021-3640

IS - 6

ER -