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Analytical model of optical force on supercavitating plasmonic nanoparticles
Optics Express
|June 29, 2023
Summary
Scientists developed a new model to understand how optical forces move nanoparticles (NPs) inside nanobubbles (NBs). This model accurately predicts NP trajectories, aiding future optical manipulation experiments.
Area of Science:
- Optics
- Nanotechnology
- Fluid Dynamics
Background:
- Optical manipulation of nanoparticles (NPs) is crucial for applications in biology and nanofabrication.
- Nanoparticles encapsulated in nanobubbles (NBs) can be manipulated by plane waves, but models for optical forces are lacking.
Purpose of the Study:
- To develop an accurate analytical model for optical forces acting on NPs within NBs.
- To predict the motion and trajectories of NPs in NP-NB systems.
Main Methods:
- Utilized vector spherical harmonics to formulate an analytical model.
- Simulated optical forces and trajectories for a gold (Au) NP within an NB.
- Visualized optical force vector fields.
Main Results:
- The model accurately captures the optical force and resultant trajectory of an NP in an NB.
- Visualization of force vector fields revealed potential NP movement paths.
- Demonstrated the model's efficacy using a solid gold NP.
Conclusions:
- The developed analytical model provides a comprehensive understanding of NP motion mechanisms in NP-NB systems.
- Offers valuable insights for designing experiments involving plane wave manipulation of supercaviting NPs.
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