研究目的
Investigating the manipulation of surface plasmon polaritons (SPPs) by tailoring the polarization state of incident light to control the excitation, orientation, and distribution of SPPs.
研究成果
The hybridly polarized vector beam provides a powerful method for controlling the excitation, orientation, and distribution of SPPs. Various SPP patterns can be achieved by tailoring the polarization state of the incident light, offering potential applications in plasmonic tweezers and other optical systems.
研究不足
The study focuses on the manipulation of SPPs using hybridly polarized beams but does not explore the effects of varying metal film materials or thicknesses extensively. The practical applications in plasmonic devices may require further optimization.
1：Experimental Design and Method Selection:
The study uses a hybridly polarized vector beam to manipulate SPPs in a high-numerical-aperture microscopic configuration. The theoretical model is based on vector diffraction theory.
2：Sample Selection and Data Sources:
The setup includes a glass substrate, a thin metal film, and air. The metal film is chosen as Ag with specific thickness and permittivity.
3：List of Experimental Equipment and Materials:
An oil-immersion objective lens with a large NA is used. The incident light beam with a hybrid SOP illuminates the pupil plane of the lens.
4：Experimental Procedures and Operational Workflow:
The incident beam is focused by the lens to excite SPPs at the interface between the glass substrate and metallic film. The SPPs propagate and form patterns after interference.
5：Data Analysis Methods:
The electric field distributions of SPPs are calculated using the Richards–Wolf vectorial diffraction theory. FDTD simulations are used to verify the theoretical results.
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