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Title: Novel materials for laser refrigeration

Abstract

The status of optical refrigeration of rare-earth-doped solids is reviewed, and the various factors that limit the performance of current laser-cooling materials are discussed. Efficient optical refrigeration is possible in materials for which {Dirac_h}{omega}{sub max} < E{sub p}/8, where {Dirac_h}{omega}{sub max} is the maximum phonon energy of the host material and E{sub p} is the pump energy of the rare-earth dopant. Transition-metal and OH{sup -}impurities at levels >100 ppb are believed to be the main factors for the limited laser-cooling performance in current materials. The many components of doped ZBLAN glass pose particular processing challenges. Binary fluoride glasses such as YF{sub 3}-LiF are considered as alternatives to ZBLAN. The crystalline system KPb{sub 2}CI{sub 5} :Dy{sup 3+} is identified as a prime candidate for high-efficiency laser cooling.

Authors:
 [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
956406
Report Number(s):
LA-UR-09-00824; LA-UR-09-824
Journal ID: ISSN 0277-786X; TRN: US201013%%147
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Proceedings of SPIE - The International Society for Optical Engineering
Additional Journal Information:
Journal Volume: 7228; Journal ID: ISSN 0277-786X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; FLUORIDES; GLASS; IMPURITIES; LASERS; PHONONS; PROCESSING; REFRIGERATION

Citation Formats

Hehlen, Markus P. Novel materials for laser refrigeration. United States: N. p., 2009. Web. doi:10.1117/12.809091.
Hehlen, Markus P. Novel materials for laser refrigeration. United States. https://doi.org/10.1117/12.809091
Hehlen, Markus P. 2009. "Novel materials for laser refrigeration". United States. https://doi.org/10.1117/12.809091. https://www.osti.gov/servlets/purl/956406.
@article{osti_956406,
title = {Novel materials for laser refrigeration},
author = {Hehlen, Markus P},
abstractNote = {The status of optical refrigeration of rare-earth-doped solids is reviewed, and the various factors that limit the performance of current laser-cooling materials are discussed. Efficient optical refrigeration is possible in materials for which {Dirac_h}{omega}{sub max} < E{sub p}/8, where {Dirac_h}{omega}{sub max} is the maximum phonon energy of the host material and E{sub p} is the pump energy of the rare-earth dopant. Transition-metal and OH{sup -}impurities at levels >100 ppb are believed to be the main factors for the limited laser-cooling performance in current materials. The many components of doped ZBLAN glass pose particular processing challenges. Binary fluoride glasses such as YF{sub 3}-LiF are considered as alternatives to ZBLAN. The crystalline system KPb{sub 2}CI{sub 5} :Dy{sup 3+} is identified as a prime candidate for high-efficiency laser cooling.},
doi = {10.1117/12.809091},
url = {https://www.osti.gov/biblio/956406}, journal = {Proceedings of SPIE - The International Society for Optical Engineering},
issn = {0277-786X},
number = ,
volume = 7228,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}