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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








From March 30 to April 2, 2025, the Institute of Molecular Biology of the National Academy of Sciences of RA and McMaster University (Canada) are holding an Advanced Research Workshop under the auspices of NATO (North Atlantic Treaty Organization) entitled "Low dose radiation risks: present research and future perspectives" (the Round Hall of NAS OF RA, Marshal Baghramyan Ave., 24)

On April 15, 2025, COST (European Cooperation in Science and Technology) Infoday will be organized in Yerevan

On April 29, 2025, the NAS RA, the Ministry of Education, Science, Culture and Sports of RA, the International Scientific and Educational Center of NAS RA, the Institute of Language after H. Acharian of NAS RA and the Institute of Literature after M. Abeghyan of NAS RA will organize a Pan-Armenian scientific conference on the topic "Armenian language and Armenian Literature: development trends, opportunities for popularization and their reflection in the educational process"

On May 5-8, 2025, the Scientific Center of Zoology and Hydroecology of the National Academy of Sciences of RA and the Yerevan State University are jointly organizing an International conference "Biodiversity, Conservation and Climate Change" (Yerevan, NAS RA main building)

On 5-9 May, 2025, Byurakan Astrophysical Observatory after V.Ambartsumian of NAS RA organizes 17th Armenian-Georgian Astronomical Colloquium in Byurakan

On 16-21 June, 2025, the Institute of Applied Problems of Physics of NAS RA organizes "IV International Scientific School for Radiation Physics and Related Applications named after Academician Alpic Mkrtchyan", in Yerevan

On 23-25 June, 2025, the Institute of Applied Problems of Physics of NAS RA organizes "International scientific school-conference 4 on acoustophysics after academician A.R. Mkrtchyan", in Yerevan and Sevan. For more information see: https://school.iapp.am/

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

Международный инновационный центр нанотехнологий СНГ (МИЦНТ СНГ) объявляет о проведении в 2025 году очередного Конкурса на соискание грантов и 18-й научной Стажировки для молодых ученых и специалистов из стран СНГ

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