Polarization-preserving confocal microscope for optical experiments in a dilution refrigerator with high magnetic field

Maksym Sladkov*, M. P. Bakker, A. U. Chaubal, D. Reuter, A. D. Wieck, C. H. van der Wal

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

7 Citaten (Scopus)
323 Downloads (Pure)


We present the design and operation of a fiber-based cryogenic confocal microscope. It is designed as a compact cold-finger that fits inside the bore of a superconducting magnet, and which is a modular unit that can be easily swapped between use in a dilution refrigerator and other cryostats. We aimed at application in quantum optical experiments with electron spins in semiconductors and the design has been optimized for driving with and detection of optical fields with well-defined polarizations. This was implemented with optical access via a polarization maintaining fiber together with Voigt geometry at the cold finger, which circumvents Faraday rotations in the optical components in high magnetic fields. Our unit is versatile for use in experiments that measure photoluminescence, reflection, or transmission, as we demonstrate with a quantum optical experiment with an ensemble of donor-bound electrons in a thin GaAs film. (C) 2011 American Institute of Physics. [doi:10.1063/1.3574217]

Originele taal-2English
Pagina's (van-tot)043105-1-043105-8
Aantal pagina's8
TijdschriftReview of Scientific Instruments
Nummer van het tijdschrift4
StatusPublished - apr.-2011

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