研究目的
To study the electromagnetic force acting on a Rayleigh particle placed in a rectangular waveguide and to determine the conditions under which the particle can be pushed away from or pulled toward the light source by tuning the frequency of the light wave.
研究成果
A particle in a rectangular waveguide can be pulled towards the light source or pushed away from the light source by varying the frequency around the waveguide cuto? frequency. This phenomenon is demonstrated through analytical calculations and validated using COMSOL Multiphysics 4.3a.
研究不足
The study is accurate within the Rayleigh scattering regime but may be inappropriate for larger particles. The model assumes a perfect electric conductor (PEC) waveguide, which is an idealization.
1：Experimental Design and Method Selection:
The study involves analytical solutions to the waveguide problem and the scattering problem using Rayleigh approximation.
2：Sample Selection and Data Sources:
A water drop of radius r = 10 μm is placed in a PEC rectangular waveguide with dimensions a = 300 μm and b = 150 μm.
3：List of Experimental Equipment and Materials:
A rectangular waveguide with perfect electric conductor (PEC) walls, a water drop as the dielectric particle.
4：Experimental Procedures and Operational Workflow:
The waveguide problem is solved analytically for TE 10 mode, and the scattering problem is addressed using Rayleigh approximation. The forces acting on the particle are calculated for both propagating and evanescent waves.
5：Data Analysis Methods:
The forces are analyzed based on the position of the particle and the frequency of the wave relative to the cuto? frequency.
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