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ABSTRACT: An extremely thin cell (ETC) was used to analyse ground state effects of Cs atoms excited by laser light and placed in a magnetic field that was scanned around zero. The advantage of using the ETC is the possibility to separate the hf transitions, which are overlapped in ordinary cells, as a result of the spatial anisotropy of the atom-light interaction. Cs atoms were irradiated by circularly/linearly polarized light at lambda~852 nm, and the dependence of absorption on the external magnetic field was measured.
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on; 07/2007
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ABSTRACT: Saturation effects affecting absorption and fluorescence spectra of an atomic vapor confined in an Extremely Thin Cell (cell thickness $L < 1 \mu m$) are investigated experimentally and theoretically. The study is performed on the $D_{2}$ line ($\lambda ~= ~852 nm)$ of $Cs$ and concentrates on the two situations $L = \lambda /2$ and $L =\lambda$, the most contrasted ones with respect to the length dependence of the coherent Dicke narrowing. For $L = \lambda /2$, the Dicke-narrowed absorption profile simply broadens and saturates in amplitude when increasing the light intensity, while for $L =\lambda$, sub-Doppler dips of reduced absorption at line-center appear on the broad absorption profile. For a fluorescence detection at $L =\lambda$, saturation induces narrow dips, but only for hyperfine components undergoing a population loss through optical pumping. These experimental results are interpreted with the help of the various existing models, and are compared with numerical calculations based upon a two-level modelling that considers both a closed and an open system. Comment: 11 pages, 12 figures
06/2007;
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ICPEAC 2005 XXIV International Conference on Photonic, Electronic and Atomic Collisions, July 20-26, Rosario, Argentina. 01/2005;
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ICPEAC 2005 XXIV International Conference on Photonic, Electronic and Atomic Collisions, July 20-26, Rosario, Argentina. 01/2005;
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ABSTRACT: Faraday rotation in a nanocell with smoothly variable thickness L of Rb atomic vapor column in the range 140-1700 nm has been obtained. Unusual behavior of Faraday rotation versus the ratio L/lambda (lambda = 780 nm) has been studied
Quantum Electronics Conference, 2004. (IQEC). International; 06/2004
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XIX International Conference On Atomic Physics (ICAP 2004), Rio de Janeiro, Brazil, 24-30 July 2004, Abstracts of Contributed Papers. 01/2004;
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XIX International Conference on Atomic Physics, Rio de Janeiro - Brazil, 25 - 30 July, 2004. 01/2004; Abstract of Contributed Papers(Optics and Pnotonics Research Center, Universitu of Sao Paulo):152.
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8th EPS conference on Atomic and Molecular Physics. 01/2004; 1:2-128.
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ABSTRACT: It is experimentally demonstrated that use of an extremely thin cell (ETC) with the thickness of a Rb atomic vapor column of 400 nm allows one to resolve a large number of individual transitions between Zeeman sub-levels of the D 1 line of 87 Rb and 85 Rb in the sub-Doppler fluorescence excitation spectra in an external mag-netic field of 200 G. It is revealed that due to the peculiarities of the Zeeman effect for different hyperfine levels of Rb, all allowed transitions between magnetic sublevels can be clearly resolved for 87 Rb F g 1 → F e 1, 2 and F g 2 → F e 1, 2 fluorescence excitation. Also, relatively good spectral resolution can be achieved for 85 Rb F g 2 → F e 2, 3 fluorescence excitation. Some partial resolution of transitions between magnetic sublevels is achieved for 85 Rb F g 3 → F e 2, 3 fluorescence excitation. The spectral resolution of individual transitions allows one to easily observe both linear and nonlinear Zeeman effects in the fluores-cence excitation spectra obtained with the help of the ETC. In the fluorescence spectra of a cell of usual length there is no evidence of a spectral resolution of individual transitions at B 200 G. A simple magnetometer based on ETC with Rb with a submicrometer spatial resolution is described.
