22 citations · 186 across the 10 of their papers we have counts for
10 papers
Geometrical optics limit of phonon transport in a channel of disclinations
Sébastien Fumeron, Bertrand Berche, Fernando Moraes +2
The presence of topological defects in a material can modify its electrical, acoustic or thermal properties. However, when a group of defects is present, the calculations can becom…
Principles of thermal design with nematic liquid crystals
S. Fumeron, E. Pereira, F. Moraes
Highly engineered materials are arousing great interest because of their ability to manipulate heat, as described by coordinate transformation approach. Based on the recently devel…
Retrieving the saddle-splay elastic constant of nematic liquid crystals from an algebraic approach
Sébastien Fumeron, Fernando Moraes, Erms Pereira
The physics of light interference experiments is well established for nematic liquid crystals. Using well-known techniques, it is possible to obtain important quantities, such as t…
Generation of optical vorticity from topological defects
Sébastien Fumeron, Erms Pereira, Fernando Moraes
The propagation of an electromagnetic wave in a medium with a screw dislocation is studied. Adopting the formalism of differential forms, it is shown that torsion is responsible fo…
Thermal diode made by nematic liquid crystal
Djair Melo, Ivna Fernandes, Fernando Moraes +2
This work investigates how a thermal diode can be designed from a nematic liquid crystal confined inside a cylindrical capillary. In the case of homeotropic anchoring, a defect str…
Propagation of acoustic waves in a von-Kármán vortex street like configuration of disclinations
Sébastien Fumeron, Bertrand Berche, Fernando Moraes +2
We show that a simple model of 1D array of topological defects in a crystalline environment is able to guide acoustic waves, depending on the angle of the incident wave. We comment…
Optics near an hyperbolic defect
Sébastien Fumeron, Bertrand Berche, Fernando Santos +2
We examine the properties of a new family of defects called hyperbolic disclinations, and discuss their possible use for the design of perfect optical absorbers. In hyperbolic meta…
Metric approach for sound propagation in nematic liquid crystals
E. Pereira, S. Fumeron, F. Moraes
In the eikonal approach, we describe sound propagation near to topological defects of nematic liquid crystal as geodesics of a non-euclidian manifold endowed with an effective metr…
Flowing Liquid Crystal Simulating the Schwarzschild Metric
Erms R. Pereira, Fernando Moraes
We show how to simulate the equatorial section of the Schwarzschild metric through a flowing liquid crystal in its nematic phase. Inside a liquid crystal in the nematic phase, a tr…
Diffraction of light by topological defects in liquid crystals
E. Pereira, F. Moraes
We study light scattering by a hedgehog-like and linear disclination topological defects in a nematic liquid crystal by a metric approach. Light propagating near such defects feels…