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physics.optics2024
Symmetry-Protected Lossless Modes in Dispersive Time-Varying Media
Calvin M. Hooper, James R. Capers, Ian R. Hooper +1
We give an exact application of a recently developed, operator-based theory of wave propagation in dispersive, time-varying media. Using this theory we find that the usual symmetry…
physics.optics2023
Manipulating the Quasi-Normal Modes of Radially Symmetric Resonators
James R Capers, Dean A Patient, Simon A R Horsley
We derive two methods for simultaneously controlling the resonance frequency, linewidth and multipolar nature of the resonances of radially symmetric structures. Firstly, we formul…
physics.optics2020
Designing Collective Non-local Responses of Metasurfaces
J. R. Capers, S. J. Boyes, A. P. Hibbins +1
We propose a numerically efficient `adjoint' inverse design method to optimize a planar structure of dipole scatterers, to manipulate the radiation from an electric dipole emitter.…