Electromagnetically induced transparency: the thickness of the vapor column is of the order of a light wavelength
- Institut Carnot de Bourgogne, UMR 5209 CNRS-Universit de Bourgogne, 9 Av. A Savary, BP47 870, F-21078 Dijon Cedex (France)
- Institute for Physical Research, National Academy of Sciences of Armenia, Ashtarak, 0203 (Armenia)
Electromagnetically induced transparency (EIT) effect has been studied using an extremely thin cell (ETC) with the thickness of an Rb vapor column of the order of light wavelength {lambda} (780 nm) and varying in the range of 0.5{lambda}-2.5{lambda}. {lambda}-systems on the D{sub 2} line of {sup 85}Rb and {sup 87}Rb have been studied experimentally. Along with EIT resonance, we study the peculiarities of velocity-selective optical pumping/saturation (VSOP) resonances, which accompany the EIT resonance and, as a rule, are spectrally broader. It is demonstrated that size-conditioned strongly anisotropic contribution of atoms with different velocities in an ETC causes several dramatic differences of the EIT and VSOP resonances formation in the ETC as compared with an ordinary 1-10 cm long cell. Particularly, in the case of the ETC, the EIT linewidth and contrast dramatically depend on the coupling laser detuning from the exact atomic transition. A theoretical model taking into account the peculiarities of transmission spectra when L=n{lambda} and L=(2n+1){lambda}/2 (n is an integer) has been developed. The experimental transmission spectra are well described by the theoretical model developed. The possibility of EIT resonance formation when atomic column thickness is of the order of L=0.5{lambda} and less is theoretically predicted.
- OSTI ID:
- 20929768
- Journal Information:
- Journal of the Optical Society of America. Part B, Optical Physics, Vol. 24, Issue 8; Other Information: DOI: 10.1364/JOSAB.24.001829; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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