Journal
LASER & PHOTONICS REVIEWS
Volume 3, Issue 1-2, Pages 67-84Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.200810038
Keywords
Solid-state laser cooling; optical refrigeration; anti-Stokes fluorescence; luminescence up-conversion; rare-earth doped solids; direct band-gap semiconductors; all-solid-state cryocooler; external quantum efficiency; GaAs; differential luminescence thermometry
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We present an overview of solid-state optical refrigeration also known as laser cooling in solids by fluorescence upconversion. The idea of cooling a solid-state optical material by simply shining a laser beam onto it may sound counter intuitive but is rapidly becoming a promising technology for future cryocoolers. We chart the evolution of this science in rare-earth doped solids and semiconductors.
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