Sub-Doppler and subnatural narrowing of an absorption line induced by interacting dark resonances in a tripod system

C. Goren, A. D. Wilson-Gordon, M. Rosenbluh, H. Friedmann

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Abstract

A tripod system consisting of three lower levels g1-3 and an excited level e interacting with two pump lasers of frequency ω 1,3 with Rabi frequencies was investigated. It was observed that the linewidth of the sharp absorption peak that appeared in the probe absorption spectrum of a degenerate tripod system could be made subnatural and sub-Doppler for copropagating lasers. A strong and narrow absorption feature appeared at the line center in a simple nearly degenerate tripod system interacting with a σ-polarized pump and a π-polarized probe in a small magnetic field. The narrow absorption peak disappeared and the system became transparent at the line center which could thus be used as a magneto-optic switch.

Original languageEnglish
Article number063802
Pages (from-to)063802-1-063802-5
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume69
Issue number6
DOIs
StatePublished - Jun 2004

Bibliographical note

Funding Information:
This research was supported, in part, by the Israel Science Foundation.

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