This article is cited in 11 papers

Laser spectroscopy

Laser spectroscopy of sub-micrometre- and micrometre-thick caesium-vapour layers

S. Cartaleva^a, A. Krasteva^a, L. Moi^bc, A. G. Sargsyan^d, D. G. Sarkisyan^d, D. Slavov^a, P. Todorov^a, K. Vaseva<sup>a

a</sup> Institute of Electronics, Bulgarian Academy of Sciences, Sofia
^b Physics Department, University of Siena, Italy
^c CNISM, Siena, Italy
^d Institute for Physical Research, National Academy of Sciences of Armenia

Abstract: We present high resolution laser spectroscopy of Cs vapours confined in a unique optical cell of sub-micrometric and micrometric thickness, where a strong spatial anisotropy is present for the time of interaction between the atoms and laser radiation. Similarly to the spectra of selective specular reflection, the Doppler-free spectra of absorption and fluorescence are observed, not revealing cross-over resonances that will be useful for frequency stabilisation, provided the cell is cheap and compact. A new resonance in the fluorescence of closed transition is studied, demonstrating its high sensitivity to elastic atom – atom and atom – dielectric surface collisions. The theoretical modelling performed is in agreement with the experimental observations.

Keywords: high-resolution laser spectroscopy, nanometric atomic vapour layers, transient effect in a nanometre-thin cell.

PACS: 42.62.Fi, 34.35.+a, 32.10.Fn

Received: 09.11.2011
Revised: 12.05.2012

 English version: Quantum Electronics, 2013, 43:9, 875–884

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