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Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures...

by Benjamin J Lawrie, Matthew A Feldman, Claire E Marvinney, Yun-yi Pai
Publication Type
Conference Paper
Journal Name
Proceedings of SPIE
Publication Date
Page Number
1180604
Volume
11806
Issue
-

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.