Produção Nacional
Two-photon Doppler cooling of alkaline-earth-metal and ytterbium atoms
2003; American Physical Society; Volume: 67; Issue: 4 Linguagem: Inglês
10.1103/physreva.67.043407
ISSN1538-4446
AutoresWictor C. Magno, Reinaldo L. Cavasso Filho, Flávio C. Cruz,
Tópico(s)Quantum optics and atomic interactions
ResumoThe possibility of laser cooling of alkaline-earth-metal atoms and ytterbium atoms using a two-photon transition is analyzed. We consider a ${}^{1}{S}_{0}{\ensuremath{-}}^{1}{S}_{0}$ transition with excitation in near resonance with the ${}^{1}{P}_{1}$ level. This greatly increases the two-photon transition rate, allowing an effective transfer of momentum. The experimental implementation of this technique is discussed and we show that for calcium, for example, two-photon cooling can be used to achieve a Doppler limit of $123\ensuremath{\mu}\mathrm{K}.$ The efficiency of this cooling scheme and the main loss mechanisms are analyzed.
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