28 citations · 54 across the 8 of their papers we have counts for
8 papers
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…
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…
Generalising the Yagi-Uda Antenna: Designing Disordered Metamaterials to Manipulate Antenna Radiation
J. R. Capers, L. D. Stanfield, J. R. Sambles +4
Next generation microwave communications systems face several challenges, particularly from congested communications frequencies and complex propagation environments. Taking inspir…
Inverse Design of Thin-Plate Elastic Wave Devices
James R Capers
Motivated by recent advances in the inverse design of electromagnetic materials, we develop two methods for manipulating flexural waves on thin elastic plates. Firstly, we derive a…
Designing Metasurfaces to Manipulate Antenna Radiation
James R Capers, Stephen J Boyes, Alastair P Hibbins +1
Designer manipulation of light at the nanoscale is key to several next-generation technologies, from sensing to optical computing. One way to manipulate light is to design a materi…
Inverse Design in the Complex Plane: Manipulating Quasi-Normal Modes
James R Capers, Dean A Patient, Simon A R Horsley
Utilising the fact that the frequency response of a material can be decomposed into the quasi-normal modes supported by the system, we present two methods to directly manipulate th…
Designing Multi-functional Metamaterials
J. R. Capers, S. J. Boyes, A. P. Hibbins +1
The ability to design passive structures that perform different operations on different electromagnetic fields is key to many technologies, from beam-steering to optical computing.…
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.…