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Springer eBooks

Evolution of the Vacuum Rabi Splitting Into a Single Peak for a Bistable Optical Cavity

J. Gripp, Nicolas Leulliot, S. L. Mielke, Luis A. Orozco

Published Jan 1, 1996• 0 citations
Publisher
DOI
10.1007/978-1-4757-9742-8_49

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Europhysics Letters (EPL)•Mar 1, 2017•12 citations
The phenomenon of "dark resonances" is a well-known concept in quantum optics and laser spectroscopy. As a general rule, interactions involving in such a "dark state" lead to multiple quantum superposition states that interact coherently and are undesirable. In this paper, two types nonlinear interaction in an atomic cavity, namely the nested and cascaded interactions, are theoretically analyzed how the dark resonances form the dark state peak to modulate the vacuum Rabi splitting (VRS) and optical bistability (OB) behavior. In both the zero- and high order modes, there are four VRS peaks generated in the nested interaction and three in the cascade interaction. Dark resonance can modulate not only the peak number of VRS, but also the OB thresholds. It is found that dark state can determine the asymmetric OB distribution of nested type and symmetric OB distribution of cascade type. Besides that, the distinctive OB thresholds in two kinds of interaction also be studied. The observations not only conceptually extend the conventional "dark resonances" phenomenon, but also opens the door for a variety of new applications in tunable all-optical switch and quantum communication.
We theoretically demonstrate the influence of dark and bright states on vacuum Rabi splitting (VRS) and optical bistability (OB) of the multi-wave-mixing (MWM) process in a collective four-level atomic-cavity coupling system. We numerically investigate the multidressed VRS and OB behavior of the zero- and high-order transmitted cavity modes of MWM signals. A further study demonstrates that VRS and self-Kerr nonlinearity OB can coexist and compete with each other in a cascade relationship, based on which we achieve the goal to control VRS and OB simultaneously through the dark state in the atomic system.
The relationship between optical bistability (OB) and vacuum Rabi splitting is experimentally demonstrated in an atomic ensemble confined in a three-mirror optical cavity. The vacuum-induced splitting and bright states can effectively affect the bistable behaviour by manipulating multiple parameters such as atomic density and detuning. Also, we observed another kind of “∞”-shape OB by scanning the probe/cavity detuning. The study can make a contribution to better understand the OB and other dynamical behaviours in a composite atom-cavity system.