Polarization-Sensitive Photothermoelectric Response Based on In-Plane Anisotropic Antiferromagnetic Semiconductor CrSBr
Two-dimensional (2D) magnetic materials are driving plenty of attention due to their scientific and technological significance. In-plane anisotropy in such a system further broadens their application areas especially in various angle-resolved functional devices. Here, we report an air-stable 2D antiferromagnetic semiconductor (CrSBr) with a strong intrinsic optical and optoelectronic in-plane anisotropy. First, the results of polarization absorption spectra demonstrate the presence of a linear dichroism (LD) transition in CrSBr, which shows consistency with our density functional theory (DFT) calculations. Besides, representative angle-resolved reflection and refraction in CrSBr flakes have been further characterized, indicating their anisotropic light–matter interactions. Moreover, a polarized photodetector based on the photothermoelectric (PTE) effect mechanism is fabricated successfully, with the dichroic ratio of Ip-max/Ip-min as measured up to 2.26 under 850 nm excitation. These results indicate a promising potential to advance the application of 2D van der Waals magnetic materials in polarization-sensitive optics, optoelectronic devices, and opto-spintronics.
Authors
- Yuhan Yang (ORCID: https://orcid.org/0000-0002-3065-2101)
- Wenshuai Gao (ORCID: https://orcid.org/0000-0002-6174-974X)
- Yong Yan (ORCID: https://orcid.org/0000-0003-4283-5324)
- Chunguang Hu (ORCID: https://orcid.org/0000-0001-6485-904X)
- Peng-Lai Gong (ORCID: https://orcid.org/0000-0001-9075-2879)
- Yuxuan Jiang (ORCID: https://orcid.org/0000-0001-7971-8354)
- Yingsong Li (ORCID: https://orcid.org/0000-0002-2450-6028)
- Zdeněk Sofer (ORCID: https://orcid.org/0000-0002-1391-4448)
- Mingliang Tian (ORCID: https://orcid.org/0000-0002-0870-995X)
- Aljoscha Söll (ORCID: https://orcid.org/0000-0003-4797-0015)
- Wanfu Shen (ORCID: https://orcid.org/0000-0002-3932-5457)
- Xue Liu (ORCID: https://orcid.org/0000-0002-9588-5491)
- Shasha Li (ORCID: https://orcid.org/0000-0001-6957-5003)
- Liang Li (ORCID: https://orcid.org/0000-0003-0708-7762)
- Yang Li (ORCID: https://orcid.org/0000-0003-4399-1505)
- Jiayuan Zhou
- Xuegang Chen (ORCID: https://orcid.org/0000-0002-3084-8681)
- Kaipeng Ni
Institutions
- Anhui University (CN)
- Tianjin University (CN)
- Chinese Academy of Sciences (CN)
- Hefei Institutes of Physical Science (CN)
- Joint Laboratory for Extreme Conditions Matter Properties (CN)
- High Magnetic Field Laboratory (CN)
- Institute of Solid State Physics (CN)
- Hebei University (CN)
- Henan Normal University (CN)
- University of Chemistry and Technology, Prague (CZ)
Publication Details
- Journal
- ACS Photonics
- Published
- 2025-04-29
- DOI
- https://doi.org/10.1021/acsphotonics.5c00065
- Citations
- 1
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- National Natural Science Foundation of China
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Natural Science Foundation of Hebei Province
- Natural Science Foundation of Henan Province
- Anhui Provincial Department of Education
- Natural Science Foundation of Anhui Province
- National Key Research and Development Program of China