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Details

  • Nationality

    Portugal
  • Centre

    Applied Photonics
  • Contacts

    +351220402301
    tiago.d.ferreira@inesctec.pt
002
Publications

2022

Nematic Liquid Crystals as a Tabletop Platform for Studying Turbulence

Authors
Ferreira, TD; Silva, NA; Guerreiro, A;

Publication
U.Porto Journal of Engineering

Abstract
Light propagating in nonlinear optical materials opens the possibility to emulate quantum fluids of light with accessible tabletop experiments by taking advantage of the hydrodynamical interpretation. In this context, various optical materials have been studied in recent years, with nematic liquid crystals appearing as one of the most promising ones due to their controllable properties. Indeed, the application of an external electric field can tune their nonlocal response, and this mechanism may be useful for producing fluids of light and developing optical analogues. In this work, we extend the applicability of nematic liquid crystal to support optical analogues and study the possibility of emulating turbulent phenomena by using two fluids of light. These fluids interact with each other through the nonlinearity of the medium and generate instabilities that will lead to turbulent regimes. We also explore the possibility of exciting turbulent regimes through the decay of dark soliton stripes. The preliminary results are presented.

2021

Exploring quantum-like turbulence with a two-component paraxial fluid of light

Authors
Silva, NA; Ferreira, TD; Guerreiro, A;

Publication
NONLINEAR OPTICS AND APPLICATIONS XII

Abstract

2021

Reservoir computing with solitons

Authors
Silva, NA; Ferreira, TD; Guerreiro, A;

Publication
NEW JOURNAL OF PHYSICS

Abstract

2021

Hardware-neutral tools for the exploration of optical phenomena in near-resonant atomic systems

Authors
Silva, NA; Ferreira, T; Guerreiro, A;

Publication
INTERNATIONAL JOURNAL OF MODERN PHYSICS C

Abstract

2021

Pressureless static solutions in a Newton-Yukawa gravity model

Authors
Ferreira, TD; Novo, J; Silva, NA; Guerreiro, A; Bertolami, O;

Publication
PHYSICAL REVIEW D

Abstract
Nonminimally coupled curvature-matter gravity models are an interesting alternative to the theory of general relativity to address the dark energy and dark matter cosmological problems. These models have complex field equations that prevent a full analytical study. Nonetheless, in a particular limit, the behavior of a matter distribution can, in these models, be described by a Schrodinger-Newton system. In nonlinear optics, the Schrodinger-Newton system can be used to tackle a wide variety of relevant situations, and several numerical tools have been developed for this purpose. Interestingly, these methods can be adapted to study general relativity problems as well as its extensions. In this work, we report the use of these numerical tools to study a particular nonminimal coupling model that introduces two new potentials, an attractive Yukawa potential, and a repulsive potential proportional to the energy density. Using the imaginary-time propagation method, we have shown that static solutions arise even at low energy density regimes.