Optical Whispering‐Gallery Mode as a Fingerprint of Magnetic Ordering in Van der Waals Layered CrSBr
Abstract An ultra‐sensitive nanoscale magnetism sensing of van der Waals layered CrSBr is demonstrated by employing optical whispering‐gallery‐mode (WGM) resonances in a self‐rolled‐up microcavity. CrSBr nanoflakes with and without intercalation are probed by monitoring the WGM resonant modes shift as a function of magnetic field intensity and temperature, revealing the presence of ferromagnetic (FM) and antiferromagnetic (AFM) order. The minimum detectable amount of CrSBr nanoflakes reaches the femtogram scale, and the detection limit is as low as 1.25 × 10 −16 emu. This study demonstrates a promising application of WGM microcavities for highly sensitive magnetism detection with reduced system complexity, establishing a novel bridge between materials’ optical and magnetic properties.
Authors
- Kseniia Mosina (ORCID: https://orcid.org/0000-0003-3570-5337)
- Chi Pang (ORCID: https://orcid.org/0000-0002-9534-6615)
- M. Helm (ORCID: https://orcid.org/0000-0001-8986-9914)
- Shengqiang Zhou (ORCID: https://orcid.org/0000-0002-4885-799X)
- Rang Li (ORCID: https://orcid.org/0000-0002-4696-3342)
- Kambiz Jamshidi (ORCID: https://orcid.org/0000-0003-3083-7760)
- Yi Li (ORCID: https://orcid.org/0000-0001-9443-7817)
- Fangchao Long (ORCID: https://orcid.org/0000-0003-1811-6776)
- Zdeněk Sofer (ORCID: https://orcid.org/0000-0002-1391-4448)
- Aljoscha Söll (ORCID: https://orcid.org/0000-0003-4797-0015)
- Yana Vaynzof (ORCID: https://orcid.org/0000-0002-0783-0707)
- Libo Ma (ORCID: https://orcid.org/0000-0001-9850-2292)
- Min Tang (ORCID: https://orcid.org/0000-0002-2218-8409)
- Feng Chen (ORCID: https://orcid.org/0000-0002-9277-9810)
Institutions
- Shandong University (CN)
- Helmholtz-Zentrum Dresden-Rossendorf (DE)
- Leibniz Institute for Solid State and Materials Research (DE)
- State Key Laboratory of Crystal Materials
- Technische Universität Dresden (DE)
- University of Chemistry and Technology, Prague (CZ)
Publication Details
- Journal
- Advanced Functional Materials
- Published
- 2025-04-24
- DOI
- https://doi.org/10.1002/adfm.202505275
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Alexander von Humboldt-Stiftung
- Deutsche Forschungsgemeinschaft