Zobrazeno 1 - 10
of 464
pro vyhledávání: '"Horsley S"'
Autor:
Horsley, S. A. R., Baker, R. K.
Macroscopic QED (MQED) is the field theory for computing quantum electromagnetic effects in dispersive media. Here we extend MQD to treat time-varying, dispersive media. For a time dependent Drude model, we find that the expected replacement ${\epsil
Externí odkaz:
http://arxiv.org/abs/2409.11873
Autor:
Arnold, K. O., Hooper, C., Smith, J., Clow, N., Hibbins, A. P., Sambles, J. R., Horsley, S. A. R.
We show that a large family of tensorial metasurfaces can be found that perform an identical wave transformation, showing that even when the conditions of reciprocity and passivity are imposed, there still remain many solutions to the design problem.
Externí odkaz:
http://arxiv.org/abs/2407.20880
Autor:
Harwood, A. C., Vezzoli, S., Raziman, T. V., Hooper, C., Tirole, R., Wu, F., Maier, S. A., Pendry, J. B., Horsley, S. A. R., Sapienza, R.
The interaction of light with superluminally moving matter entails unconventional phenomena, from Fresnel drag to Hawking radiation and to light amplification. While relativity makes these effects inaccessible using objects in motion, synthetic motio
Externí odkaz:
http://arxiv.org/abs/2407.10809
Autor:
Li, Mingjie, Horsley, S. A. R.
We find a new set of exact solutions to Maxwell's equations in space--time varying materials, where the refractive index is constant, while the impedance exhibits effective motion, i.e. it is a function of $x-vt$. We find that waves co--propagating w
Externí odkaz:
http://arxiv.org/abs/2404.09075
Autor:
Horsley, S. A. R., Pendry, J. B.
We show that a grating amplitude stationary in space but oscillating in time can be accurately modelled as a set of independent gratings travelling in opposite directions, interacting almost exclusively with waves travelling in the same direction. Th
Externí odkaz:
http://arxiv.org/abs/2402.07486
Autor:
Li, Mingjie, Horsley, S. A. R.
Maxwell's equations and the Dirac equation are the first-order differential relativistic wave equation for electromagnetic waves and electronic waves respectively. Hence, there is a notable similarity between these two wave equations, which has been
Externí odkaz:
http://arxiv.org/abs/2308.01869
Autor:
Capers, J. R., Stanfield, L. D., Sambles, J. R., Boyes, S. J., Powell, A. W., Hibbins, A. P., Horsley, S. A. R.
Next generation microwave communications systems face several challenges, particularly from congested communications frequencies and complex propagation environments. Taking inspiration from the Yagi-Uda antenna, we present, and experimentally test,
Externí odkaz:
http://arxiv.org/abs/2306.17528
Autor:
Horsley, S. A. R., Dwivedi, A.
Whereas electromagnetic surface waves are confined to a planar interface between two media, line waves exist at the one-dimensional interface between three materials. Here we derive a non-local integral equation for computing the properties of line w
Externí odkaz:
http://arxiv.org/abs/2306.12808
We develop a compact theory that can be applied to a variety of time-varying dispersive materials. The continuous wave reflection and transmission coefficients are replaced with equivalent operator expressions. In addition to comparing this approach
Externí odkaz:
http://arxiv.org/abs/2208.11778
We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced radiation efficiency from a small microwave emitter. Using an iterative process centred on comparing the phase of the radiated fi
Externí odkaz:
http://arxiv.org/abs/2209.13670