76 citations · 347 across the 17 of their papers we have counts for
17 papers
Reconfigurable topological valley-Hall interfaces: Asymptotics of arrays of Dirichlet and Neumann inclusions for multiple scattering in metamaterials
Richard Wiltshaw, Henry J. Putley, Christelle Bou Dagher +1
We study two-dimensional periodic metamaterials in which idealised cylindrical inclusions are modelled by boundary conditions. In the scalar time-harmonic setting, the background f…
Asymptotically exact photonic analogues of chiral symmetric topological tight-binding models
Samuel J Palmer, Yordan Ignatov, Richard V Craster +1
Topological photonic edge states, protected by chiral symmetry, are attractive for guiding wave energy as they can allow for more robust guiding and greater control of light than a…
Acoustic topological circuitry in square and rectangular phononic crystals
Nicolas Laforge, Richard Wiltshaw, Richard V. Craster +6
We systematically engineer a series of square and rectangular phononic crystals to create experimental realisations of complex topological phononic circuits. The exotic topological…
Hybrid topological guiding mechanisms for photonic crystal fibers
Mehul P. Makwana, Richard Wiltshaw, Sébastien Guenneau +1
We create hybrid topological-photonic localisation of light by introducing concepts from the field of topological matter to that of photonic crystal fiber arrays. S-polarized obliq…
Localising elastic edge waves via the topological rainbow effect
Bogdan Ungureanu, Mehul P. Makwana, Richard V. Craster +1
We combine two different fields, topological physics and graded metamaterials to design a topological metasurface to control and redirect elastic waves. We strategically design a t…
Asymptotic approximations for Bloch waves and topological mode steering in a planar array of Neumann scatterers
Richard Wiltshaw, Richard V. Craster, Mehul P. Makwana
We study the canonical problem of wave scattering by periodic arrays, either of infinite or finite extent, of Neumann scatterers in the plane; the characteristic lengthscale of the…
Experimental observations of topologically guided water waves within non-hexagonal structures
Mehul P. Makwana, Nicolas Laforge, Richard V. Craster +4
We investigate symmetry-protected topological water waves within a strategically engineered square lattice system. Thus far, symmetry-protected topological modes in hexagonal syste…
Observations of symmetry induced topological mode steering in a reconfigurable elastic plate
Kun Tang, Mehul P. Makwana, Richard V. Craster +1
We experimentally investigate the valley-Hall effect for interfacial edge states, highlighting the importance of the modal patterns, between geometrically distinct regions within a…
Manipulating Topological Valley Modes in Plasmonic Metasurfaces
Matthew Proctor, Paloma A. Huidobro, Stefan A. Maier +2
The coupled light-matter modes supported by plasmonic metasurfaces can be combined with topological principles to yield subwavelength topological valley states of light. We give a…
Novel topological beam-splitting in photonic crystals
Mehul P. Makwana, Richard Craster, Sebastien Guenneau
We create a passive wave splitter, created purely by geometry, to engineer three-way beam splitting in electromagnetism in transverse electric polarisation. We do so by considering…
Tunable three-way valley Hall energy-splitter: venturing beyond graphene-like structures
Mehul P. Makwana, Gregory J. Chaplain
Strategically combining four structured domains creates the first ever three-way topological energy-splitter; remarkably, this is only possible using a square, or rectangular, latt…
Rayleigh-Bloch, topological edge and interface waves for structured elastic plates
G. J. Chaplain, M. P. Makwana, R. V. Craster
Galvanised by the emergent fields of metamaterials and topological wave physics, there is currently much interest in controlling wave propagation along structured arrays, and inter…
Designing multi-directional energy-splitters and topological valley supernetworks
Mehul Makwana, Richard Craster
Using group theoretic and topological concepts, together with tunneling phenomena, we geometrically design interfacial wave networks that contain splitters which partition energy i…
Geometrically navigating topological platonic modes around gentle and sharp bends
Mehul Makwana, Richard Craster
Predictive theory to geometrically engineer devices and materials in continuum systems to have desired topological-like effects is developed here by bridging the gap between quantu…
Wave mechanics in media pinned at Bravais lattice points
Mehul Makwana, Tryfon Antonakakis, Ben Maling +2
The propagation of waves through microstructured media with periodically arranged inclusions has applications in many areas of physics and engineering, stretching from photonic cry…
High frequency homogenisation for elastic lattices
D. J. Colquitt, R. V. Craster, M. Makwana
A complete methodology, based on a two-scale asymptotic approach, that enables the homogenisation of elastic lattices at non-zero frequencies is developed. Elastic lattices are dis…
High-frequency homogenisation for hexagonal and honeycomb lattices
Mehul Makwana, Richard Craster
A high-frequency asymptotic scheme is generated that captures the motion of waves within discrete hexagonal and honeycomb lattices by creating continuum homogenised equations. The…