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Laser cooling of solids to cryogenic temperatures (Articolo in rivista)
- Type
- Label
- Laser cooling of solids to cryogenic temperatures (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1038/NPHOTON.2009.269 (literal)
- Alternative label
Seletskiy D.V., Melgaard S.D., Bigotta S., Di Lieto A., Tonelli M. and Sheik-Bahae M. (2010)
Laser cooling of solids to cryogenic temperatures
in Nature photonics (Print); Nature Publishing Group, New York (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Seletskiy D.V., Melgaard S.D., Bigotta S., Di Lieto A., Tonelli M. and Sheik-Bahae M. (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1. Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
2. Univ Pisa, NEST CNR INFM, Dipartimento Fis, I-56127 Pisa, Italy (literal)
- Titolo
- Laser cooling of solids to cryogenic temperatures (literal)
- Abstract
- Laser radiation has been used to cool matter ranging from
dilute gases to micromechanical oscillators. In Doppler
cooling of gases, the translational energy of atoms is lowered
through interaction with a laser field1,2. Recently, cooling of a
high-density gas through collisional redistribution of radiation
has been demonstrated3. In laser cooling of solids, heat is
removed through the annihilation of lattice vibrations in the
process of anti-Stokes fluorescence4-6. Since its initial obser-vation in 1995, research7-15 has led to achieving a temperature
of 208 K in ytterbium-doped glass16. In this Letter, we report
laser cooling of ytterbium-doped LiYF4 crystal to a temperature
of ?155 K starting from ambient, with a cooling power of
90 mW. This is achieved by making use of the Stark manifold
resonance in a crystalline host, and demonstrates the lowest
temperature achieved to date without the use of cryogens or
mechanical refrigeration. Optical refrigeration has entered the
cryogenic regime, surpassing the performance of multi-stage
Peltier coolers.
The process of optical refrigera (literal)
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