Magneto-optics
Hybrid Quantum Systems

Experiments in the external magnetic field allows observing of higher excitonic states, identifying the origin of excitonic transitions, including interlayer excitons in bilayers and bulk and give information about exciton masses and dielectric properties of various van der Waals material among other.

Lab impressions

To perform magneto-optical experiments at cryogenic temperatures down to 4 K and under magnetic fields up to 5 T (out-of-plane) and 2 T (in-plane), we utilize a closed-cycle cryostat equipped with a 3D vector superconducting magnet and motorized nanopositioners (attoDRY1000, attocube). This versatile system enables detailed investigations of magnetic responses, such as the magnetic anisotropy of multilayer CrSBr, correlated magnetic order, and associated optical transitions. Low-temperature measurements are crucial for revealing intrinsic linewidths determined by sample quality, as phonon absorption is significantly suppressed.

References:

“Magnetic Correlation Spectroscopy in CrSBr”

Lukas Krelle, Ryan Tan, Daria Markina, Priyanka Mondal, Kseniia Mosina, Kevin Hagmann, Regine von Klitzing, Kenji Watanabe, Takashi Taniguchi, Zdenek Sofer, Bernhard Urbaszek

arXiv:2503.08390

Link

“Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields”

M. Goryca, J. Li, A.V. Stier, T. Taniguchi, K. Watanabe, E. Courtade, S. Shree, C. Robert, B. Urbaszek, X. Marie & S.A. Crooker, Nature Communications, 10, 4172 (2019)

Link