Prospects for laser cooling TlF

Laser cooling in solids: advances and prospects.

This review discusses the progress and ongoing efforts in optical refrigeration. Optical refrigeration is a process in which phonons are removed from a solid by anti-Stokes fluorescence. The review first summarizes the history of optical refrigeration, noting the success in cooling rare-earth-doped solids to cryogenic temperatures. It then examines in detail a four-level model of rare-earth-bas...

Measurement of the Zeeman effect in an atomic anion: Prospects for laser cooling of Os−

The negative osmium ion Os− is one of very few atomic anions potentially suitable for laser cooling. We have made a measurement of the Zeeman splitting of a bound-bound transition in 192Os− by studying the laser excitation from the 5d76s2 4F e9/2 ground to the 5d 66s26p D9/2 excited state in a homogeneous external magnetic field. The experimental Landé factors gJ = 1.31(7) and gJ = 1.50(8), res...

Laser Cooling of Semiconductors

Optical irradiation accompanied by spontaneous anti-Stokes emission can lead to cooling of matter, a phenomenon known as laser cooling or optical refrigeration proposed in 1929 by Peter Pringsheim. In solid state materials, the cooling is achieved by annihilation of lattice vibrations (i.e., phonons). Since the first experimental demonstration in rare-earth doped glasses, considerable progress ...

Laser cooling of atoms

The concept of radiation-pressure cooling of atoms was independently suggested in 1975 for the case of a gas of neutral atoms by Hänsch and Schawlow, and for atomic ions bound in an electromagnetic trap by Wineland and Dehmelt. While the notion that momentum exchange from a photon moving in the opposite direction could slow an individual atom was well understood, until this time no one had come...

Transient laser cooling.