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Quantum Electronics and Laser Science Conference

Observation of Electromagnetically Induced Transparency le Collisionally Broadened Lead Vapor

Kenneth H. Hahn, J. E. Field, Stephen E. Harris

Published May 12, 1991• 0 citations
OpenAlex

Abstract

In this paper, we report the observation of electromagnetically induced transparency in collisionally broadened lead vapor. Electromagnetically induced transparency based on lifetime broadening has been observed by Boiler et al), where transparency was induced by a quantum interference. We extend the regime of electromagnetically induced transparency to collisionaly broadened resonance lines. A strong field which couples a resonantly broadened state to another state with a smaller collisional rate decreases the loss, and the transmission of an optically thick media is increased from below our dynamic range (Io/Iin<10−6)to Io/Iin = 10−1

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Observation of electromagnetically induced transparency in collisionally broadened lead vapor

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Observation of Electromagnetically Induced Transparency in Collisionally Broadened Lead Vapor

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Frontiers in Optics•Jan 1, 2008•0 citations
In this paper, we report the observation of electromagnetically induced transparency in collisionally broadened lead vapor. Electromagnetically induced transparency based on lifetime broadening has been observed by Boiler et al), where transparency was induced by a quantum interference. We extend the regime of electromagnetically induced transparency to collisionaly broadened resonance lines. A strong field which couples a resonantly broadened state to another state with a smaller collisional rate decreases the loss, and the transmission of an optically thick media is increased from below our dynamic range (Io/Iin<10−6)to Io/Iin = 10−1
Electromagnetically-induced transparency has become an important tool to control the optical properties of dense media. However, in a broad class of systems, the interplay between inhomogeneous broadening and the existence of several excited levels may lead to a vanishing transparency. Here, by identifying the underlying physical mechanisms resulting in this effect, we show that transparency can be strongly enhanced. We thereby demonstrate a 5-fold enhancement in a room-temperature vapor of alkali-metal atoms via a specific shaping of the atomic velocity distribution.
We study, theoretically and experimentally, electromagnetically induced transparency (EIT) in two different solid-state systems. Unlike many implementations in homogeneously broadened media, these systems exhibit inhomogeneous broadening of their optical and spin transitions typical of solid-state materials. We observe EIT lineshapes typical of atomic gases, including a crossover into the regime of Autler-Townes splitting, but with the substitution of the inhomogeneous widths for the homogeneous values. We obtain quantitative agreement between experiment and theory for the width of the transparency feature over a range of optical powers and inhomogeneous linewidths. We discuss regimes over which analytical and numerical treatments capture the behavior. As solid-state systems become increasingly important for scalable and integratable quantum optical and photonic devices, it is vital to understand the effects of the inhomogeneous broadening that is ubiquitous in these systems. The treatment presented here can be applied to a variety of systems, as exemplified by the common scaling of experimental results from two different systems.