Journal ArticleDOI
Dark and bright Doppler-free resonances observed in atomic 87Rb vapor
Reads0
Chats0
TLDR
In this paper, the authors investigate an inhomogeneously broadened four-level atomic system driven by two strong coherent fields and probed by a weak laser, and they show that the experimental results can be well understood by separately considering the probe absorptions arising from partial atoms with different velocities.Abstract:
We investigate an inhomogeneously broadened four-level atomic system driven by two strong coherent fields and probed by a weak laser. By carefully adjusting strengths of the driving fields, we can observe a greatly enhanced peak between two dark resonances in the probe absorption spectrum. The enhanced absorption peak will split into two lower ones and then result in a third dark resonance if we gradually weaken one driving field. Ultimately, the whole probe absorption spectrum evolves towards the usual EIT spectrum with only one dark resonance. Based on appropriate numerical calculations and qualitative analysis, we show that the experimental results can be well understood by separately considering the probe absorptions arising from partial atoms with different velocities.read more
Citations
More filters
Journal ArticleDOI
Group velocity control in the ultraviolet domain via interacting dark-state resonances
TL;DR: In this article, a weak probe field is applied to the probe transition and the peak structure can be changed such that both sub and superluminal light propagation or a negative group velocity can be achieved without absorption, controlled by the incoherent pumping strength.
Journal ArticleDOI
Influence of multiple excited states on optical properties of an -type Doppler-broadened system for the D2 line of alkali atoms
Vineet Bharti,Ajay D. Wasan +1 more
TL;DR: In this article, a six-level atomic system using a density matrix approach to show variation of the optical properties in an -type Doppler-broadened system for the D2 line of alkali atoms with the nuclear spin I = 3/2, i.e. 87Rb, 23Na and 7Li.
Journal ArticleDOI
Double-cavity optical bistability and all-optical switching in four-level N-type atomic system
TL;DR: In this article, the authors analyzed the absorptive and hybrid absorptive-dispersive doublecavity optical bistability behavior in a four-level N-type atomic system driven by two optical fields circulating inside two independently unidirectional ring cavities and a trigger field outside the cavities.
Journal ArticleDOI
Double dark resonances and the dispersion properties in a four-level inverted-Y atomic system
Jun Kou,Ren-Gang Wan,Shang-Qi Kuang,Shang-Qi Kuang,Li Jiang,Liang Zhang,Zhi-Hui Kang,Hai-Hua Wang,Jin-Yue Gao +8 more
TL;DR: In this paper, the electromagnetically induced transparency (EIT) and its dispersion properties in a four-level inverted-Y atomic system are investigated, and the absorption spectrum of a weak probe field shows two EIT windows (dark resonances) whose location, width, and depth can be controlled by manipulating the parameters of the coupling fields.
Journal ArticleDOI
Coherently induced hole-burnings in a Doppler broadened four-level atomic system
TL;DR: In this article, the authors investigate the absorption spectra of a probe laser in warm rubidium atoms driven into the four-level N configuration and show that there are six coherent hole-burnings and one (two) transparency window(s) in the probe spectra, when the perturbing laser co-propagates with the probe laser and both coupling and saturating lasers are exactly resonant with their driving transitions.
References
More filters
Journal ArticleDOI
Atomic four-level N systems
TL;DR: In this article, the authors investigate the atomic four-level $N$ configuration both analytically and numerically, for various pump and probe intensities, with and without transfer of coherence (TOC) and Doppler broadening, and compare the results obtained to those of realistic atomic systems.