Trapping of neutral sodium atoms with radiation pressure.
نویسندگان
چکیده
We report the confinement and cooling of an optically dense cloud of neutral sodium atoms by radiation pressure. The trapping and damping forces were provided by three retroreflected laser beams propagating along orthogonal axes, with a weak magnetic field used to distinguish between the beams. We have trapped as many as 10 7 atoms for 2 min at densities exceeding lOll atoms cm -3. The trap was =0.4 K deep and the atoms, once trapped, were cooled to less than a millikelvin and compacted into a region less than 0.5 mm in diameter.
منابع مشابه
Laser cooling and trapping of neutral atoms*
In 1978, while I was a postdoctoral fellow at MIT, I read a paper by Art Ashkin (1978) in which he described how one might slow down an atomic beam of sodium using the radiation pressure of a laser beam tuned to an atomic resonance. After being slowed, the atoms would be captured in a trap consisting of focused laser beams, with the atomic motion being damped until the temperature of the atoms ...
متن کاملMagneto-Optical Trap for Sodium Atoms from a Vapor Cell and Observation of Spatial Modes
During the pa;t few years there has been an enormous progress in the use of light to manipulate the translational degr:es of freedom of atoms. Laser light resonant with an atornic transition has been used to slowl, coo12 and ti.ap3 neutral atorns. An intense effort is now being carritsd out with the purpose of using laser radiation techniques t o improve methods of atomic manipulation in order ...
متن کاملElectromagnetically induced transparency in a sodium vapour cell
We report on an investigation of electromagnetically induced transparency (EIT) in sodium vapour. In our experiment, sodium atoms are excited on the D1-line with laser radiation containing two components with a frequency difference close to that of the two hyperfine ground states of sodium (1.772 GHz). Such an excitation leads to coherent trapping of atomic population in “dark” superpositional ...
متن کاملAtom cooling, trapping, and quantum manipulation
Modern atomic, molecular, and optical physics has advanced primarily by using known physics to devise innovative techniques to better isolate and control the atomic system, and then exploiting this nearly ideal system to achieve higher precision and discover new physical phenomena. The striking advances along these lines have been recognized by awards of Nobel Prizes to 21 individuals in this a...
متن کاملObservation of Atoms Laser-Cooled Below the Doppler Limit
This 1989 paper [1] reported a breakthrough which led to a Nobel Prize for William D. Phillips—the first Nobel to be awarded to a NBS/NIST staff scientist. The experiment described in the paper demonstrated that light from a laser could be used to cool atoms to a much lower temperature than was previously thought possible. The fact that light carries momentum and can exert a force on objects wa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 59 23 شماره
صفحات -
تاریخ انتشار 1987