11 August 2023
James R Capers,
Dean A Patient,
Simon A R Horsley
Methods derived to control resonance properties by changing permittivity
Eigenvalue problem places resonance at desired frequency
Perturbation theory also allows resonance manipulation
Permits simultaneous control of frequency, linewidth, multipole order
Enables engineering of scattering properties
Controlling resonance properties of radially symmetric structures
This paper develops methods to precisely control the frequency, linewidth, and multipolar nature of resonances in radially symmetric structures like cylinders and spheres. By formulating an eigenvalue problem or using perturbation theory, the permittivity distribution can be tailored to place resonances at target complex frequencies. This enables the design of structures with engineered scattering properties.
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