Laser cooling techniques: standard and alternated optical molasses
نویسندگان
چکیده
منابع مشابه
epl draft Sub - Doppler laser cooling of fermionic 40 K atoms in three - dimensional gray optical molasses
We demonstrate sub-Doppler cooling of K on the D1 atomic transition. Using a gray molasses scheme, we efficiently cool a compressed cloud of 6.5 × 10 atoms from ∼ 4 mK to 20μK in 8 ms. After transfer in a quadrupole magnetic trap, we measure a phase space density of ∼ 10−5. This technique offers a promising route for fast evaporation of fermionic K. Introduction. – Cooling of fermionic atomic s...
متن کاملSub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line
Gray molasses is a powerful tool for sub-Doppler laser cooling of atoms to low temperatures. For alkaline atoms, this technique is commonly implemented with cooling lasers which are blue-detuned from either the D1 or D2 line. Here we show that efficient gray molasses can be implemented on the D2 line of K with red-detuned lasers. We obtained temperatures of m ( ) 48 2 K, which enables direct lo...
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We present a detailed study of the mode structure of inverse opal photonic crystal materials with an emphasis on their potential use in optical trapping and cooling. In particular, we analyze the modes corresponding to the upper and lower band edges of a high refractive index inverse opal, i.e., the so-called ;;air' and ;;dielectric' bands. In the dielectric band, we demonstrate optical intensi...
متن کاملBeyond optical molasses: 3D raman sideband cooling of atomic cesium to high phase-space density
We demonstrate a simple, general purpose method to cool neutral atoms. A sample containing 3x10(8) cesium atoms prepared in a magneto-optical trap is cooled and simultaneously spin polarized in 10 ms at a density of 1.1x10(11) cm (-3) to a phase space density nlambda(3)(dB) = 1/500, which is almost 3 orders of magnitude higher than attainable in free space with optical molasses. The technique i...
متن کاملTime dependence of laser cooling in optical lattices
We study the dynamics of the cooling of a gas of caesium atoms in an optical lattice, both experimentally and with 1D full-quantum Monte Carlo simulations. We find that, contrary to the standard interpretation of the Sisyphus model, the cooling process does not work by a continuous decrease of the average kinetic energy of the atoms in the lattice. Instead, we show that the momentum of the atom...
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ژورنال
عنوان ژورنال: Revista Brasileira de Ensino de Física
سال: 2017
ISSN: 1806-1117
DOI: 10.1590/1806-9126-rbef-2017-0102