Type-II Weyl Semimetal NbIrTe<sub>4</sub> Nanosheets for High Signal-to-Noise Ratio Pulsed Laser Generation
The two-dimensional van der Waals layered topological material NbIrTe4 has attracted much attention as a type-II Weyl semimetal due to its high mobility, superconductivity, and excellent photoresponse. Here, we synthesized high-quality NbIrTe4 single crystals using the molten salt method and then obtained the corresponding nanosheets through mechanical exfoliation. Then, the morphology, chemical composition, and nonlinear optical characteristics of NbIrTe4 were thoroughly examined. The saturable absorption (SA) properties of NbIrTe4 were measured by using a balanced two-detector system, indicating a modulation depth of 28.3% and a saturation intensity of 8.5 μJ cm–2. Subsequently, we realized a nanoscale low-threshold pulsed laser based on NbIrTe4–SA, which consistently maintains a signal-to-noise ratio up to 50 dB across varying pump powers, and the pulse duration was as short as 2.8 μs. Our work expands the family of C-band pulsed lasers utilizing two-dimensional materials, paving the way for the application of NbIrTe4 nanosheets in nonlinear optics and photonics.
Authors
- Xuefen Kan
- Chuang Sun (ORCID: https://orcid.org/0000-0001-8427-177X)
- Xianping Wang (ORCID: https://orcid.org/0000-0001-5228-578X)
- Yan Zhan (ORCID: https://orcid.org/0000-0002-0686-3128)
- Yinlong Luo
- Fang Long (ORCID: https://orcid.org/0000-0002-4744-7155)
- Siyu Li (ORCID: https://orcid.org/0000-0001-5979-8633)
- Liu Yang (ORCID: https://orcid.org/0009-0004-1733-8152)
- Qiang Yu (ORCID: https://orcid.org/0000-0003-2172-8861)
- Zixin Yang (ORCID: https://orcid.org/0009-0007-8467-1715)
- Sijie Wang (ORCID: https://orcid.org/0000-0002-4505-8404)
- Jing Deng
- Tong Yang (ORCID: https://orcid.org/0009-0009-8311-5543)
Institutions
- National University of Defense Technology (CN)
- Chinese Academy of Sciences (CN)
- Suzhou Institute of Nano-tech and Nano-bionics (CN)
- Shanghai Ship and Shipping Research Institute (CN)
- Jiangxi Normal University (CN)
- Inner Mongolia University of Technology (CN)
- East China Normal University (CN)
Publication Details
- Journal
- ACS Applied Nano Materials
- Published
- 2024-08-22
- DOI
- https://doi.org/10.1021/acsanm.4c04393
- Citations
- 4
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.35
Funders
- Natural Science Foundation of Nantong City
- National Natural Science Foundation of China
- Government of Jiangsu Province