Spectrum of resonance fluorescence excited by an evanescent wave at a gas-solid interface

Vladimir G. Bordo

doi:10.1117/12.180839

21 July 1994 Spectrum of resonance fluorescence excited by an evanescent wave at a gas-solid interface

Vladimir G. Bordo

Proceedings Volume 2125, Laser Techniques for Surface Science; (1994) https://doi.org/10.1117/12.180839
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

We present the results of a theoretical investigation of the fluorescence spectrum from the gas of two-level atoms strongly driven by an evanescent wave (EW). The mean time-of-flight of atoms across the EW is supposed to be less than the relaxation times in the gas volume. Assuming the atomic absorption line to be Doppler-broadened we analyze two specific cases: (1) the atoms over the whole Doppler contour are excited by the EW in the adiabatic-following regime and (2) the EW 'burns out the hole' inside the absorption line. In case (1) in addition to the well- known Mollow triplet the line at the atomic transition frequency appears due to the transient behavior of the atoms departing the surface. In case (2) the spectrum has a sub-Doppler structure sensitive to the type of the atom-surface scattering (diffuse, specular or inelastic). In both cases the spectrum depends on the sticking probability and phases of the scattering in the ground and excited states.

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Vladimir G. Bordo "Spectrum of resonance fluorescence excited by an evanescent wave at a gas-solid interface", Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); https://doi.org/10.1117/12.180839

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KEYWORDS

Chemical species

Scattering

Luminescence

Interfaces

Doppler effect

Absorption

Solids

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