Observation of Intricate Chiral Optical Force in a Spin-Curl Light Field
Harnessing chiral optical forces facilitates numerous applications in enantioselective sorting and sensing. To date, significant challenges persist in substantiating the holistic complex theorem of these forces as experimental demonstrations employ common light waves (e.g., Gaussian beams and evanescent waves), showcasing the reversal of optical force against handedness (light's or particle's). Here, we elucidate the cooperative significance of incorporating multiple optical forces to generate an intricate chiral optical force in a complex spin-curl field. The interplay of distinct light properties (the transverse spin, Belinfante spin momentum, and energy vortex) is found to induce abnormal phenomena. For instance, this intriguing total force not only reverses its sign with particle handedness but also correlates strongly with particle size and light helicity. Experimental measurements of quasi-achiral and chirality-determined forces manifest our research as a paradigm for testing the holistic optical-force theorem on chiral particles, which is unattainable by previous reports that only affirm a specific type of chiral optical forces. Our study offers wide applications in chiral sensing, sorting, spintronics, metamaterials, etc.
Authors
- Yuzhi Shi (ORCID: https://orcid.org/0000-0002-9041-0462)
- A. Mazzulla (ORCID: https://orcid.org/0000-0002-1938-3959)
- Weiqiang Ding (ORCID: https://orcid.org/0000-0002-8225-2951)
- G. Cipparrone (ORCID: https://orcid.org/0000-0003-4880-1942)
- Qinghua Song (ORCID: https://orcid.org/0000-0002-4622-0418)
- Xinbin Cheng (ORCID: https://orcid.org/0000-0002-3855-483X)
- Haiyang Huang (ORCID: https://orcid.org/0000-0002-6000-3567)
- Cheng‐Wei Qiu (ORCID: https://orcid.org/0000-0002-6605-500X)
- Pin Chieh Wu (ORCID: https://orcid.org/0000-0002-5781-9696)
- Hang Li (ORCID: https://orcid.org/0000-0003-1177-0927)
- Yan Zu (ORCID: https://orcid.org/0000-0003-2588-5231)
- Chengxing Lai
- Weicheng Yi
Institutions
- Tongji University (CN)
- National University of Singapore (SG)
- Harbin Institute of Technology (CN)
- Istituto Nanoscienze (IT)
- Institute of Nanotechnology (GB)
- University of Chinese Academy of Sciences (CN)
- University of Calabria (IT)
- National Cheng Kung University (TW)
- Tsinghua University (CN)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-12-04
- DOI
- https://doi.org/10.1103/physrevlett.133.233802
- Citations
- 11
- Primary Topic
- Orbital Angular Momentum in Optics
- Type
- article
- Field-Weighted Citation Impact
- 3.71
Funders
- National Natural Science Foundation of China
- Shanghai Municipal Education Commission
- Science and Technology Commission of Shanghai Municipality
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities