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Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures

Conference · · Proc.SPIE Int.Soc.Opt.Eng.
DOI:https://doi.org/10.1117/12.2595780· OSTI ID:1875892

We describe the operation of a free-space confocal optical microscope operated in a dilution refrigerator. The microscope is installed on a cold insertable probe to enable fast sample exchange while the refrigerator is held at low temperatures. A vector magnet provides a 6 T field normal to the sample and 1 T fields at arbitrary angles. A variety of optical microscopies and spectroscopies, including photoluminescence, Raman, magneto-optical Kerr effect, and spin relaxometry measurements are described, and some of the challenges associated with performing these measurements at milliKelvin temperatures are explored.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1875892
Report Number(s):
FERMILAB-CONF-21-851-V; arXiv:2103.06851; oai:inspirehep.net:1851202
Journal Information:
Proc.SPIE Int.Soc.Opt.Eng., Vol. 11806
Country of Publication:
United States
Language:
English

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