Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures
- Oak Ridge; Fermilab
- Oak Ridge; Vanderbilt U.
- Oak Ridge
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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