Mainz 1997 – wissenschaftliches Programm
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Q: Quantenoptik
Q 20: Poster Ib: Atomoptik
Q 20.5: Poster
Dienstag, 4. März 1997, 16:00–18:00, Phil. Fak.
Velocity-selective coherent population trapping on narrow transitions — •N. Leinfellner1, I.E. Mazets2, E.A. Korsunsky1, and L. Windholz1 — 1Institut f"ur Experimentalphysik, Technische Universit"at Graz, Petersgasse 16, A-8010 Graz — 2IOFFE Institute of Physics and Technology, St.Petersburg Technical State University, Politekhnicheskaya 26, RU-194021 St.Petersburg
We report on investigations of subrecoil laser cooling mechanisms for atoms used in atomic frequency standards. Particularly, we present numerical results of calculations for the element calcium (40Ca). Its narrow 1S0 -3P1 transition promises considerable improvements of ultra-high resolution spectroscopy to establish frequency standards with relative uncertainties much lower than those provided by the popular cesium atomic clocks. We perform calculations concerning velocity-selective coherent population trapping in a single- and a double-cascade scheme. It turns out that by the proper choice of certain parameters it is possible to cool calcium atoms, precooled in a magneto-optical trap, very efficiently below the recoil limit.
Supported by the "Osterreichischer Fonds zur Förderung der wissenschaftlichen Forschung, project no. S 6508.