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A Modified Method of Faraday Rotation for Investigation of Atomic Lines of Rubidium and Potassium in Ultrathin Cells

  • SPECTROSCOPY AND PHYSICS OF ATOMS AND MOLECULES
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Abstract

A nanocell filled with atomic vapors of rubidium and potassium was used to develop a modified method of Faraday rotation. The formed lines are characterized by a spectral width that is a factor of 1.5‒2 smaller than those obtained by traditional method of Faraday rotation in nanocells. The new method allows obtaining the spectral width of atomic line that is 8 times smaller than the Doppler broadening in the case of the D2 line of rubidium and 15 time smaller than the Doppler broadening in the case of the D1,2 lines of potassium. In magnetic fields B = 100−1200 G, all atomic lines of Rb and K atoms are spectrally resolved and identified. In the case of the D2 line of Rb, it is demonstrated that the probabilities of magneto-induced transitions (87Rb, Fg = 1 → Fe = 3 and 85Rb, Fg = 2 → Fe = 4) can exceed the probabilities of the allowed transitions. Convenience and efficiency of the modified method of Faraday rotation for high-resolution spectroscopy is demonstrated.

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ACKNOWLEDGMENTS

We are grateful to A. Papoyan, A. Tonoyan, and G. Hakhumyan for useful discussions. A. Sargsyan, A. Amiryan, and D. Sarkisyan acknowledge support from the State Committee on Science of the Ministry of Education and Science of the Republic of Armenia (project no. SCS 18T-1C018). We also acknowledge the financial support of the Armenian National Science and Education Foundation, grant ANSEF Opt 4732. A. Amiryan is grateful to AGBU France and the Philippossian Foundation in Geneva, along with AUF & SCS (Bourse pour la mobilité scientifiques et universitaires conjoints AUF—Ministère de l’Education et des Sciences de la République d’Arménie, Comité National des sciences). T. Vartanyan carried out research within the framework of state order no. 3.4903.2017/6.7.

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Authors and Affiliations

  1. Institute for Physical Research, National Academy of Sciences of Armenia, 0203, Ashtarak, Armenia

    A. Sargsyan, A. Amiryan & D. Sarkisyan

  2. Laboratoire Interdisciplinaire Carnot de Bourgogne, Université Bourgogne-Franche-Comté, BP 47870, 21078, Dijon Cedex, France

    A. Amiryan

  3. ITMO University, 197101, St. Petersburg, Russia

    T. A. Vartanyan

Authors
  1. A. Sargsyan
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  2. A. Amiryan
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  3. T. A. Vartanyan
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  4. D. Sarkisyan
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Corresponding authors

Correspondence to A. Sargsyan or T. A. Vartanyan.

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Translated by I. Shumai

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Sargsyan, A., Amiryan, A., Vartanyan, T.A. et al. A Modified Method of Faraday Rotation for Investigation of Atomic Lines of Rubidium and Potassium in Ultrathin Cells. Opt. Spectrosc. 126, 173–180 (2019). https://doi.org/10.1134/S0030400X19030202

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  • DOI: https://doi.org/10.1134/S0030400X19030202

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