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Study of the Interaction of Rubidium Atoms with Sapphire Surface Using Spectroscopic Nanocells

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The influence of a dielectric surface on Rb atoms (D2-line) at nanometer distances has been experimentally studied. Use of a nanocell with a wedge-shaped gap filled with atomic rubidium made it possible to study the influence of atoms at distances in the range 45–150 nm from the surface of a commercial sapphire window. The 85Rb and 87Rb atomic transitions were strongly broadened at distances <130 nm from the sapphire surface due to Van-der- Waals interactions. Their frequencies shifted to the low-frequency spectral region. Use of the second-derivative method of nanocell absorption spectra made it possible to measure the Van-der-Waals interaction coefficient C3 = 1.8 ± 0.3 kHz·μm3 for the Rb D2-line. An additional red shift was shown to occur at a nanocell thickness of 65 ± 5 nm due to dipole–dipole interaction of Rb atoms as the atomic density increased. The results could be used to develop miniature submicron devices.

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Authors and Affiliations

  1. Institute for Physical Research, National Academy of Sciences of Armenia, Ashtarak, Armenia

    A. Sargsyan

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  1. A. Sargsyan
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Correspondence to A. Sargsyan.

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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 90, No. 4, pp. 535–540, July-August, 2023

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Sargsyan, A. Study of the Interaction of Rubidium Atoms with Sapphire Surface Using Spectroscopic Nanocells. J Appl Spectrosc 90, 731–735 (2023). https://doi.org/10.1007/s10812-023-01588-6

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  • DOI: https://doi.org/10.1007/s10812-023-01588-6

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