Optical cryocooling of diamond

Kern, M, Jeske, J, Lau, D, Greentree, A, Jelezko, F and Twamley, J 2017, 'Optical cryocooling of diamond', Physical Review B, vol. 95, 235306, pp. 1-8.

Document type: Journal Article
Collection: Journal Articles

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Title Optical cryocooling of diamond
Author(s) Kern, M
Jeske, J
Lau, D
Greentree, A
Jelezko, F
Twamley, J
Year 2017
Journal name Physical Review B
Volume number 95
Article Number 235306
Start page 1
End page 8
Total pages 8
Publisher American Physical Society
Abstract The cooling of solids by optical means only using anti-Stokes emission has a long history of research and achievements. Such cooling methods have many advantages ranging from no moving parts or fluids through to operation in vacuum and may have applications to cryosurgery. However, achieving large optical cryocooling powers has been difficult to manage except in certain rare-earth crystals but these are mostly toxic and not biocompatible. Through study of the emission and absorption cross sections we find that diamond, containing either nitrogen vacancy (NV) or silicon vacancy defects, shows potential for optical cryocooling and, in particular, NV doping shows promise for optical refrigeration. We study the optical cooling of doped diamond microcrystals ranging 10-250 μm in diameter trapped either in vacuum or in water. For the vacuum case we find NV-doped microdiamond optical cooling below room temperature could exceed |T | > 10 K for irradiation powers of Pin < 100 mW. We predict that such temperature changes should be easily observed via large alterations in the diffusion constant for optically cryocooled microdiamonds trapped in water in an optical tweezer or via spectroscopic signatures such as the zero-phonon line width or Raman line.
Subject Condensed Matter Physics not elsewhere classified
Nonlinear Optics and Spectroscopy
Optical Physics not elsewhere classified
DOI - identifier 10.1103/PhysRevB.95.235306
Copyright notice ©2017 American Physical Society
ISSN 2469-9950
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