aqora

Laser cooling by use of coherent population trapping in cascade scheme

Eugeny Korsunsky, Boris G. Matisov, Laurentius Windholz

European Quantum Electronics Conference (EQEC)Jan 1, 19930 citations

Sub-Doppler Laser Cooling and Magnetic Trapping of SrF Molecules

Matthew Steinecker

Jan 1, 20192 citations

Velocity selective Coherent Population Trapping and its Application to Laser Cooling

Rainer Gaggl, Wolfgang Maichen, Rhea C. Holler +2 more

Jan 1, 19940 citations

Subrecoil Laser Cooling with Adiabatic Transfer

Tilman Esslinger, F. Sander, Matthias Weidemüller +2 more

We demonstrate subrecoil cooling of rubidium atoms by velocity-selective coherent population trapping. By adiabatic transfer of the cooled atoms into a spin polarized single momentum state we show the coherence of the trapped state. Our cooling scheme takes advantage of the rubidium hyperfine structure to integrate subrecoil and sub-Doppler cooling. Starting from an initial velocity distribution of twice the recoil temperature $[{T}_{\mathrm{rec}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(\ensuremath{\Elzxh}k{)}^{2}{/k}_{B}M]$, we cool down to 100 nK $(\ensuremath{\approx}\frac{1}{3}{T}_{\mathrm{rec}})$ within 1 ms, while almost completely suppressing the diffusive heating of velocity-selective coherent population trapping.We demonstrate subrecoil cooling of rubidium atoms by velocity-selective coherent population trapping. By adiabatic transfer of the cooled atoms into a spin polarized single momentum state we show the coherence of the trapped state. Our cooling scheme takes advantage of the rubidium hyperfine structure to integrate subrecoil and sub-Doppler cooling. Starting from an initial velocity distribution of twice the recoil temperature $[{T}_{\mathrm{rec}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(\ensuremath{\Elzxh}k{)}^{2}{/k}_{B}M]$, we cool down to 100 nK $(\ensuremath{\approx}\frac{1}{3}{T}_{\mathrm{rec}})$ within 1 ms, while almost completely suppressing the diffusive heating of velocity-selective coherent population trapping.

Physical Review LettersApr 1, 199656 citations

Laser cooling of three-level atoms in two standing waves

Dmitry V. Kosachiov, Yu. Rozhdestvensky, Gerard Nienhuis

We present a general theoretical description of laser cooling of three-level atoms in a Λ configuration in two standing waves. Detunings, intensity, and spatial phase difference of the two waves are arbitrary. We demonstrate that, for a zero spatial phase shift, sub-Doppler cooling requires equal detunings. The basic mechanism is then coherent population trapping. For different detunings sub-Doppler cooling occurs only when the spatial phases of the two standing waves are different. This effect can be traced back to a mechanism of the Sisyphus type. These schemes of sub-Doppler cooling require neither polarization gradients nor magnetic fields.We present a general theoretical description of laser cooling of three-level atoms in a Λ configuration in two standing waves. Detunings, intensity, and spatial phase difference of the two waves are arbitrary. We demonstrate that, for a zero spatial phase shift, sub-Doppler cooling requires equal detunings. The basic mechanism is then coherent population trapping. For different detunings sub-Doppler cooling occurs only when the spatial phases of the two standing waves are different. This effect can be traced back to a mechanism of the Sisyphus type. These schemes of sub-Doppler cooling require neither polarization gradients nor magnetic fields.

Journal of the Optical Society of America BMar 1, 199713 citations

Dynamics and limits of laser cooling by velocity-selective coherent population trapping

Boris G. Matisov, Eugeny Korsunsky, Vyacheslav M Gordienko +1 more

Laser PhysicsJan 1, 19942 citations

Sub-Doppler Laser Cooling and Coherent Population Trapping

Related papers

Sub-Doppler Laser Cooling and Coherent Population Trapping

Related papers