Abstract
The observations of anomalous emission near the D1 transition of a dense (>or=1014 cm-3) sodium vapour illuminated by a laser detuned to the blue with respect to the D2 transition is studied and reported. A discussion of existing models is presented. The authors propose a type of parametric down-conversion process to explain this emission. This process involves a laser photon splitting into two photons by the three-level system of sodium, assisted by a magnetic dipole transition.
Original language | English |
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Article number | 006 |
Pages (from-to) | L63-L68 |
Journal | Journal of Physics B: Atomic and Molecular Physics |
Volume | 20 |
Issue number | 2 |
DOIs | |
State | Published - 1 Dec 1987 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics