Volume 67, Number 1, July 2004
|Page(s)||35 - 41|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 June 2004|
Observation of narrow fluorescence from doubly driven four-level atoms at room temperature
Raman Research Institute - Sadashivnagar, Bangalore, 560 080 India
Accepted: 28 April 2004
Unusually narrow spectral features are seen in fluorescence peaks from atoms under the action of two driving laser fields that are in a three-dimensional molasses configuration. One of the lasers, L1, is held at a fixed detuning from the “cooling” transition, while the other, L2, is scanned across the “repumping” transitions. The fluorescence peaks are split into symmetric pairs, with the separation within a pair increasing with the detuning of the L1 laser. For large detunings, additional small peaks are seen. A simple model is proposed to explain these experimental observations.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 32.70.Jz – Line shapes, widths, and shifts
© EDP Sciences, 2004
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