Coherent laser spectroscopy of rubidium atoms
08 Oct 2010-Vol. 7747, pp 86-94
TL;DR: In this paper, the authors used two or three external cavity diode lasers to study multiple resonance transitions in Λ-and V-type systems as well as on (Λ+V)-type system.
Abstract: Laser spectroscopy experiments are reported on rubidium atoms by using two or three external cavity diode lasers to
study multiple resonance transitions in Λ- and V-type systems as well as on (Λ+V)-type system. Electromagnetically
induced transparency (EIT) peaks having sub-natural line-widths are found on the Doppler broadened transmission
backgrounds with velocity selective enhanced absorption dips. In the presence of a pump laser, probe spectrum shows
enhancement of EIT signal by tuning the control laser frequency when the Λ- and V-type EIT signals are made to
overlap. Theoretical analysis is carried out by solving the optical Bloch equations for five-level atomic model under Λ
configuration. With the numerically simulated spectra, variation of EIT transmission peak with ground state decay rate
and excited state spontaneous decay rate are investigated. Effect of pump Rabi frequency on the transmission peak is
also shown.
References
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TL;DR: In this paper, the basic mechanisms used in laser cooling and trapping, and illustrates the development of the field by describing a selection of key experiments, are discussed, and a review of the key experiments is presented.
505 citations
15 Jul 2007
TL;DR: A review of laser cooling and trapning techniques can be found in this article, where the authors present a review of some of the principal techniques used in the past 20 years, including laser cooling, atom trapping and Bose-Einstein condensation.
Abstract: This article presents a review of some of the principal techniques of laser cooling and trapping that have been developed during the past 20 years. Its approach is primarily experimental, but its quantitative descriptions are consistent in notation with most of the theoretical literature.
Keywords:
laser cooling;
atom trapping;
optical lattice;
Bose–Einstein condensation
347 citations
"Coherent laser spectroscopy of rubi..." refers background in this paper
...The stronger laser beam called the pump beam is applied from the upper ground hyperfine level (F = 2) (2)...
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TL;DR: The use of a coupling electromagnetic field is described to provide a general method of producing inversion-free laser systems and the interference between dressed states produces a zero in absorption while allowing gains of the order of that of the uncoupled system.
Abstract: We describe the use of a coupling electromagnetic field to provide a general method of producing inversion-free laser systems. The interference between dressed states produces a zero in absorption while allowing gains of the order of that of the uncoupled system.
258 citations
"Coherent laser spectroscopy of rubi..." refers background in this paper
...Total probe transmission is obtained by integrating equation (7) for all possible velocity range of the atoms....
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TL;DR: A theoretical and experimental investigation has been carried out into the viability of V-type, ε-Lambda-type and cascade systems within rubidium for the observation of electromagnetically-induced transparency (EIT) as discussed by the authors.
Abstract: A theoretical and experimental investigation has been carried out into the viability of V-type, \ensuremath{\Lambda}-type, and cascade systems within rubidium for the observation of electromagnetically-induced transparency (EIT). A \ensuremath{\Lambda}-type system is also discussed where EIT is induced on a two-photon transition. Continuous-wave single-frequency titanium sapphire lasers have been employed to provide the applied optical fields. It is found that systems that have a strong coupling field resonant with the 5${\mathit{S}}_{1/2}$ ground state suffer from complicating optical pumping mechanisms that tend to mask EIT windows. It is also found that wavelength matching of the applied optical fields enhances the observation of EIT since this results in a reduced residual Doppler linewidth of the atomic system.
209 citations
TL;DR: In this paper, a perturbation approach was used to analyze the coherent population trapping in alkali-metal atoms, and closed form transparent solutions were obtained for the coherences existing within the system and the populations of the ground levels and of the excited state.
Abstract: The phenomenon of coherent population trapping in alkali-metal atoms is analyzed by means of a perturbation approach. Closed form transparent solutions are obtained for the coherences existing within the system and the populations of the ground levels and of the excited state. The presence of dark lines and coherent microwave emission from the ground state are made explicit. Experimental results that confirm the theoretical calculations are reported for the case of cesium in a buffer gas. Conclusions are drawn in connection with the application of coherent population trapping to the field of atomic frequency standards.
182 citations
"Coherent laser spectroscopy of rubi..." refers background in this paper
...Under rotating-wave approximation (RWA), a set of optical Bloch equation can be derived from equation (6)....
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