Zobrazeno 1 - 10
of 833
pro vyhledávání: '"Caloz, Christophe"'
Periodic Leaky-Wave Antennas (P-LWA) offer highly directive and space-scanning radiation. Unfortunately, they have been plagued by the ``broadside issue'', characterized by a degradation in gain when the antenna's main beam is steered across broadsid
Externí odkaz:
http://arxiv.org/abs/2410.02037
Space-time modulation systems have garnered significant attention due to their resemblance to moving-matter systems and promising applications. Unlike conventional moving-matter systems, modulation systems do not involve net motion of matter, and are
Externí odkaz:
http://arxiv.org/abs/2404.00079
Autor:
Stevens, Artuur, Caloz, Christophe
We present a general theory for calculating photon transitions in arbitrarily time-varying metamaterials. This theory circumvents the difficulties of conventional approaches in solving such a general problem by exploiting the eigenstates of time-depe
Externí odkaz:
http://arxiv.org/abs/2404.04273
Autor:
De Kinder, Klaas, Caloz, Christophe
We present a general analytical solution to the problem of electromagnetic scattering at a one-dimensional arbitrarily accelerated space-time engineered-modulation (ASTEM) interface in the subluminal regime. We show that such an interface fundamental
Externí odkaz:
http://arxiv.org/abs/2402.10114
Autor:
Ok, Furkan, Caloz, Christophe
We solve the problem of electron scattering at a soft temporal potential step. Given the relativistic nature of the problem, we use the Dirac equation, with its spinor wavefunction. We find solutions in terms of hypergeometric functions, which demons
Externí odkaz:
http://arxiv.org/abs/2403.12972
Publikováno v:
Sci Rep 14, 5559 (2024)
We solve the problem of electron scattering at a potential temporal step discontinuity. We show that the Schrodinger equation cannot account for scattering in this problem, necessitating resort to the Dirac equation, and that breaking gauge symmetry
Externí odkaz:
http://arxiv.org/abs/2307.08111
Space-time modulation-based metamaterials have recently spurred considerable interest, owing to the fundamental addition of the time dimension to the medium parameters, and resulting novel properties and potential applications. However, the implement
Externí odkaz:
http://arxiv.org/abs/2307.05613
This paper presents a space-time-wise orthogonal analysis of space-time crystals. This analysis provides a solution consisting of a pair of explicit parametric equations that result from a separate application of the Bloch-Floquet theorem in the (ort
Externí odkaz:
http://arxiv.org/abs/2306.08726
We present a generalized FDTD scheme to simulate moving electromagnetic structures with arbitrary space-time configurations. This scheme is a local adaptation and 2+1-dimensional extension of the uniform and 1+1-dimensional scheme recently reported i
Externí odkaz:
http://arxiv.org/abs/2306.10035
Electromagnetic scattering in moving structures is a fundamental topic in physics and engineering. Yet, no general numerical solution to related problems has been reported to date. We introduce here a generalized FDTD scheme to remedy this deficiency
Externí odkaz:
http://arxiv.org/abs/2304.06586