28 citations · 90 across the 17 of their papers we have counts for
17 papers
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…
Acoustic surface modes on metasurfaces with embedded next-nearest neighbor coupling
D. B. Moore, J. R. Sambles, A. P. Hibbins +2
We design, simulate, and experimentally characterize an acoustic metasurface comprising of a 1D array of open, sound-hard, cavities, modulated with beyond-nearest-neighbor (BNN) co…
Microwave Demonstration of Purcell Effect Enhanced Radiation Efficiency
L. D. Stanfield, A. W. Powell, S. A. R. Horsley +2
We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced radiation efficiency from a small microwave emitter. Using…
Reconfigurable Elastic Metamaterials: Engineering Dispersion with Meccano
G. J. Chaplain, I. R. Hooper, A. P. Hibbins +1
We design, simulate and experimentally characterise a reconfigurable elastic metamaterial with beyond-nearest-neighbour (BNN) coupling. The structure is composed from the popular B…
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…
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.…
Underwater Focussing of Sound by Umklapp Diffraction
Gregory J. Chaplain, Richard V. Craster, Nick Cole +2
Scholte modes that are localized between a submerged axisymmetric-structured elastic plate and surrounding fluid can undergo mode conversion via Umklapp diffraction into radiative…
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.…
Graded Index Confined Spin Waves in an Intermediate Domain Wall
D. Osuna Ruiz, A. P. Hibbins, F. Y. Ogrin
We propose a mathematical model for describing propagating confined modes in domain walls of intermediate angle between domains. The proposed model is derived from the linearised B…
Hippopede curves for modelling radial spin waves in an azimuthal graded magnonic landscape
D. Osuna Ruiz, A. P. Hibbins, F. Y. Ogrin
We propose a mathematical model for describing radially propagating spin waves emitted from the core region in a magnetic patch with n vertices in a magnetic vortex state. The azim…
Time-domain imaging of curling modes in a confined magnetic vortex and a micromagnetic study exploring the role of spiral spin waves emitted by the core
D. Osuna Ruiz, P. S. Keatley, J. R. Childress +4
The curling spin wave modes of a ferromagnetic vortex confined to a microscale disc have been directly imaged in response to a microwave field excitation using time-resolved scanni…
Dynamics of Spiral Spin Waves in Magnetic Nano-patches: Influence of Thickness and Shape
D. Osuna Ruiz, E. Burgos Parra, N. Bukin +5
We explore the dynamics of spiral spin waves in Permalloy nano-elements with variable aspect ratio of geometric dimensions, and their potential use as improved spin wave emitters w…
Discovery of ideal Weyl points with helicoid surface states
Biao Yang, Qinghua Guo, Ben Tremain +11
Weyl points, serving as monopoles in the momentum space and laying the foundation of topological gapless phases, have recently been experimentally demonstrated in various physical…
Observation of photonic Fermi arcs in topological metamaterials
Biao Yang, Qinghua Guo, Ben Tremain +8
The discovery of topological phases introduces new perspectives and platforms for various interesting physics originally investigated in quantum context and then, on an equal footi…
Experimental evidence of total absorption by a thin absorbing layer deposited on a patterned metallic surface
Ana Díaz-Rubio, Alastair Hibbins, Jorge Carbonell +1
This work presents the experimental demonstration of total absorption by a metal-dielectric metasurface. Following the theoretical proposal [A. Díaz-Rubio et al. Phys. Rev. B 89, 2…
Experimental evidence of giant pure optical activity in a metasurface based on a complementary twisted cross configuration
Ana Díaz-Rubio, Ben Tremain, Jorge Carbonell +2
This work presents an experimental study of giant and pure optical activity in a periodic structure consisting of twisted crosses and complementary crosses patterned on the sides o…
Topological Modes in One Dimensional Solids and Photonic Crystals
Timothy J. Atherton, Celia A. M. Butler, Melita C. Taylor +4
It is shown theoretically that a one-dimensional crystal with time reversal symmetry is characterized by a Z_{2} topological invariant that predicts the existence or otherwise of e…