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D2-Line Spectroscopy of Potassium Atoms in an Optical Nanocell
Abstract
The features of the transmission spectra of laser radiation through a nanocell with a variable thickness of the potassium atom vapor column in the range of 300–2000 nm of the D2-line are investigated. It is shown that at low laser radiation intensities, a narrowing of the resonance transmission spectrum is observed at thicknesses of L = (2n + 1)λ/2 (n is an integer) and a broadening of the spectrum at thicknesses of L = nλ. With an increase in the laser radiation intensity, velocity selective optical pumping resonances appear in the transmission spectrum of the nanocell. They are located at atomic transitions and have a spectral width 13 times smaller than the Doppler width. A comparison of the resonances in the nanocell with the resonances formed by the known saturated absorption technique is carried out. The obtained results can be used to form narrow optical resonances in miniature devices containing atomic vapors.
About the Author
A. Sargsyan
Institute for Physical Research of the National Academy of Sciences of Armenia
Armenia
Armenia
Ashtarak
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Review
For citations:
Sargsyan A. D2-Line Spectroscopy of Potassium Atoms in an Optical Nanocell. Zhurnal Prikladnoii Spektroskopii. 2025;92(6):713-718. (In Russ.)
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