Engineering Circular Dichroism in the Nonlinear Optical Region with a Refractory Plasmonic Molybdenum Metasurface
Chiral plasmonic metasurfaces exhibit circular dichroism (CD) and serve as a key tool for chiroptics. However, in the linear optical regime, the CD value remains fixed. Moreover, conventional chiral plasmonic metasurfaces suffer from poor photothermal stability, making it difficult to excite their nonlinear optical properties. Here, we present a refractory plasmonic molybdenum (Mo) metasurface that not only maintains strong chiroptical effects under extreme conditions, withstanding temperatures up to 1100 °C and laser intensities exceeding 12 GW/cm<sup>2</sup>, but also realizes intensity-dependent tunable CD in the nonlinear optical region due to chiral saturated absorption and chiral reverse saturable absorption. In addition, our metasurface exhibits giant third-harmonic generation. Finally, we demonstrate a proof-of-concept circularly polarized light limiter based on this refractory chiral Mo metasurface.
Authors
- Tianji Liu (ORCID: https://orcid.org/0000-0002-5862-2449)
- Feng Lin (ORCID: https://orcid.org/0000-0003-2381-1407)
- Tao Ding (ORCID: https://orcid.org/0000-0002-1817-3327)
- Junichi Takahara (ORCID: https://orcid.org/0000-0002-3683-626X)
- Peng Yu (ORCID: https://orcid.org/0000-0002-0242-7003)
- Alexander O. Govorov (ORCID: https://orcid.org/0000-0003-1316-6758)
- Hongxing Xu (ORCID: https://orcid.org/0000-0002-1718-8834)
- Shuai Yue (ORCID: https://orcid.org/0000-0003-3613-7271)
- Zhiming M. Wang (ORCID: https://orcid.org/0000-0001-7847-7704)
Institutions
- University of Electronic Science and Technology of China (CN)
- Yunnan University (CN)
- Chinese Academy of Sciences (CN)
- Center for NanoScience (DE)
- Wuhan University (CN)
- Changchun Institute of Optics, Fine Mechanics and Physics (CN)
- Ohio University (US)
- National Center for Nanoscience and Technology (CN)
- University of Chinese Academy of Sciences (CN)
- The University of Osaka (JP)
Publication Details
- Journal
- ACS Nano
- Published
- 2025-05-17
- DOI
- https://doi.org/10.1021/acsnano.5c05694
- Citations
- 1
- Primary Topic
- Plasmonic and Surface Plasmon Research
- Type
- article
- Field-Weighted Citation Impact
- 0.67
Funders
- Natural Science Foundation of Jilin Province
- Ministry of Education, Culture, Sports, Science and Technology
- Department of Science and Technology of Sichuan Province