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Title: Wave propagation in metamaterials mimicking the topology of a cosmic string
Author: Fernández Núñez, Isabel
Bulashenko, Oleg
Keywords: Cosmologia
Ones gravitacionals
Gravitational waves
Issue Date: 5-Mar-2018
Publisher: IOP Publishing
Abstract: We study the interference and diffraction of light when it propagates through a metamaterial medium mimicking the spacetime of a cosmic string¿a topological defect with curvature singularity. The phenomenon may look like a gravitational analogue of the Aharonov-Bohm effect, since the light propagates in a region where the Riemann tensor vanishes, being nonetheless affected by the non-zero curvature confined to the string core. We carry out the full-wave numerical simulation of the metamaterial medium and give the analytical interpretation of the results by use of the asymptotic theory of diffraction, which turns out to be in excellent agreement. In particular, we show that the main features of wave propagation in a medium with conical singularity can be explained by four-wave interference involving two geometrical optics and two diffracted waves.
Note: Versió postprint del document publicat a:
It is part of: Journal of Optics, 2018, vol. 20, num. 4, p. 045603
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ISSN: 2040-8978
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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