Abstract
We consider a single two-level atom inside a resonant optical cavity, with cavity loss rate K, atomic fluorescence rate into noncavity modes A, and atom-field coupling g. For large atomcavity coupling (g > A, K) and weak driving fields, the fluorescence from this system exhibits a splitting of the spectral line, known as vacuum-Rabi splitting.1 When the cavity loss rate is the largest rate in the problem (K > A, g), the fluorescent spectrum is Lorentzian with a cavity-enhanced width.2 We examine the regime where A > g > K, and find that the spectrum exhibits a hole at line center as a result of quantum interference effects. This effect is formally identical to the phenomenon of electromagnetically induced transparency (HIT) in multilevel atomic systems.3 We discuss the relationship of these spectral holes to the presence of squeezing in the intracavity field, and present results also for the emission spectra, and incoherent spectra in transmission and fluorescence.4
© 1996 Optical Society of America
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