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Scientific Results
07/10/2022
At the Institute for Physical Research of the National Academy of Sciences of the Republic of Armenia, the absorption and fluorescence spectra of a nanocell containing vapor of an alkali metal were recorded for the first time at room temperature

At the Institute for Physical Research of the National Academy of Sciences of the Republic of Armenia, the absorption and fluorescence spectra of a nanocell containing vapor of an alkali metal were recorded for the first time at room temperature, which is important for applications in comprehensive systems.

"The practical significance of the work is great, as it allows studying many features of optical phenomena at room temperature of 200C. Before that, the nanocell was heated to 1200C. The nanocell can be used in the research of the influence of external magnetic fields on atoms in the range of 10-10000 Gs, moreover, it is possible to measure both homogeneous and highly inhomogeneous external magnetic fields," said David Sarkisyan, the head of the Atomic Spectroscopy Laboratory of the Institute of Physical Research of NAS RA, doctor of physical –and- mathematical sciences.

A nanocell consists of two sapphire plates, the distance between them is 1000 times smaller than the thickness of a hair. Atomic vapors of Cs are located in such thin thicknesses. As a result of the thermal motion of the atoms, there is a huge broadening of the resonant transitions of Cs (Doppler phenomenon). The most common sub-Doppler method existing in laser spectroscopy is the saturation absorption (SA) method, which, however, according to David Sarkisyan, has a drawback, because "additional" transitions are observed in the spectrum

besides atomic resonance transitions. "The intensities of the atomic transitions formed by the saturation absorption method do not correspond to the real intensities of these transitions given in the literature. In contrast to SA method, purely atomic resonance transitions are recorded in the absorption or fluorescence spectra of the nanocell, and their intensities exactly match the real intensities of the transitions reported in the literature. Therefore, the nanocell can be used as a frequency marker for atomic transitions. In this work, it has been shown that increasing the sensitivity of the photo-receiver allows the nanocell to be used at room temperature," said David Sarkisyan.

The research was carried out within the framework of the basic funding of the Institute for Physical Research of the National Academy of Sciences of the Republic of Armenia.The results of the research were published in the scientific journal JETP (A.Sargsyan, R.Momier, A.Papoyan, D.Sarkisyan, Journal of Experimental and Theoretical Physics 133 (4), 404-410 (2021)).

"Following the downloads of this work from the website, it can be seen that the work has arisen a great interest among foreign scientists," said David Sarkisyan.

The participants of the working group are Armen Sargsyan, Aram Papoyan, David Sarkisyan, researchers of the Institute for Physical Research of the National Academy of Sciences of the Republic of Armenia, Rodolphe Momier, a PhD student of the University of Burgundy, France.


Notices








On 8-11 September, 2025, the Institute for Physical Research of NAS RA is holding the XIII International Conference on Magnetic and Superconducting Materials (MSM25) in Yerevan, Armenia

On September 8–12, 2025, Byurakan Astrophysical Observatory after V. Ambartsumian of NAS RA organizes the 4th Byurakan Regional Summer School "Astronomy and Data Science" (4RASS) in Byurakan

On September 15–19, 2025, Byurakan Astrophysical Observatory after V. Ambartsumian of NAS RA organizes the international conference "Astronomical Surveys and Big Data – 3" (ASBD-3) in Byurakan

On September 16–19, 2025, the Division of Physics and Astrophysics of NAS RA and the Institute for Physical Research of NAS RA will organize the Annual International Conference on "Laser Physics". The opening ceremony of the Conference LP 2025 and the first-day scientific session devoted to the Quantum Science and Technologies will be held at the Presidium of NAS RA

On September 21-25, 2025 Scientific Technological Center of Organic and Pharmaceutical Chemistry of NAS RA, Yerevan State University and N.D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences are organizing the International Conference "New Emerging Trends in Chemistry" (NewTrendsChem-2025)

On 22–26 September, 2025, Institute for Informatics and Automation problems of NAS RA organizes the 15th International Conference on "Computer Science and Information Technologies - CSIT-2025" (Yerevan, Armenia)

On 22-26 September, 2025, the Institute of Mechanics NAS RA organizes IX international conference "Topical Problems of Continuum Mechanics" (Tsakhkadzor, Armenia)

On September 26-27, 2025 the Shirak Center for Armenological Studies of NAS RA invites you to Gyumri to participate in the 12th International Conference entitled "Historical and Cultural Heritage of Shirak: Contemporary Issues of Armenian Studies"

On October 6–10, 2025, Byurakan Astrophysical Observatory after V. Ambartsumian of NAS RA will host the international conference "Astronomical Heritage of the Middle East – 2" (AHME-2) under the auspices of UNESCO in Byurakan

On October 17-18, 2025, the NAS RA, the Ministry of Education, Science, Culture and Sports of RA, the International Scientific and Educational Center of NAS RA will organize a "National Sciences, Mathematics, Technology, and Computer Science in the 21st Century: problems and solutions in the field of popularization and education" 8th Pan-Armenian Conference at the National Academy of Sciences of RA

The process of allocating full-time and part-time PhD admission slots for the 2026–2027 academic year has commenced. The deadline for application submission is October 20, 2025, at 18:00 (via Higher Education and Science Committee system: grants.hesc.am)

On October 22-25, 2025, The Institute of Literature after M. Abeghyan of the National Academy of Sciences of the Republic of Armenia, The Division of Armenology and Social Sciences of the National Academy of Sciences of the Republic of Armenia, The Institute of World Literature after A.M. Gorky of the Russian Academy of Sciences, Mekhitarist Congregation, Yerevan State University, House-Museum of Avetik Isahakian, The Fundamental Scientific Library of the National Academy of Sciences of the Republic of Armenia, invite to participate in the jubilee international conference dedicated to the 150th anniversary of Avetik Isahakyan's birth

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