Laser spectroscopy with nanometric cells containing atomic vapor of metal: influence of buffer gas

D. Sarkisyan; G. Hakhumyan; A. Sargsyan; R. Mirzoyan; C. Leroy; Y. Pashayan-Leroy

doi:10.1117/12.881838

17 January 2011 Laser spectroscopy with nanometric cells containing atomic vapor of metal: influence of buffer gas

D. Sarkisyan, G. Hakhumyan, A. Sargsyan, R. Mirzoyan, C. Leroy, Y. Pashayan-Leroy

Proceedings Volume 7747, 16th International School on Quantum Electronics: Laser Physics and Applications; 77470C (2011) https://doi.org/10.1117/12.881838
Event: XVI International School on Quantum Electronics: Laser Physics and Applications, 2010, Nessebar, Bulgaria

Abstract

Comparison of absorption and fluorescence in a nano-cell containing Rb vapor with other Rb nano-cells with addition of neon gas is presented. It is shown that the effect of collapse and revival of Dicke-type narrowing occurs for Rb nanocells containing N2 as buffer gas under 6 and 20 Torr pressure for the thickness L = λ /2 and L = where λ is the resonant λ, laser wavelength 794 nm (D1 line). Particularly for 6 Torr the line-width of the transmission spectrum for the thickness L =λ/2 is 2 times narrower than that for L = λ. For an ordinary Rb cell with L = 0.1 - 10 cm with addition of buffer gas, the velocity selective optical pumping/saturation (VSOP) resonances in saturated absorption spectra are fully suppressed when the buffer gas pressure > 0.5 Torr. A spectacular difference is that for L = λ, VSOP resonances located at the atomic transitions are still observable even when Ne pressure is ≥ 6 Torr. Narrowband fluorescence spectra of a nano-cell with L = λ/2 can be used as a convenient tool for online buffer gas pressure monitoring for the conditions when ordinary pressure gauges are unusable. Comparison of electromagnetically induced transparency (EIT) effect in a nano-cell filled with pure (without a buffer gas) Rb with another nano-cell, where buffer gas nitrogen is added, is presented. The use of N2 gas inside Rb nano-cells strongly extends the range of coupling laser detunings in which it is still possible to form EIT resonance.

Citation Download Citation

D. Sarkisyan, G. Hakhumyan, A. Sargsyan, R. Mirzoyan, C. Leroy, and Y. Pashayan-Leroy "Laser spectroscopy with nanometric cells containing atomic vapor of metal: influence of buffer gas", Proc. SPIE 7747, 16th International School on Quantum Electronics: Laser Physics and Applications, 77470C (17 January 2011); https://doi.org/10.1117/12.881838

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