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Project: Exotic Phenomena in Helical-Shaped Wire Metamaterials: from Imaging and Sensing to Topological Protection

Acronym: HelicalMETA
Main Objective:
1. To provide the first experimental verification of the subwavelength imaging capabilities of a helical-shaped wire medium lens for TE-polarized sources by delivering a microwave prototype.
2. To perform a theoretical and numerical study on the Fano resonances emerging in the scattering properties of systems formed by two interlaced helical-shaped wire arrays.
3. To fully characterize theoretically and demonstrate experimentally the topological properties of helical-shaped wire MTMs. In particular, this research line will:
a. Provide a theoretical analysis of the topological properties of this photonic MTM, presenting first principles calculations of the topological charge of the Weyl points that are predicted to exist in these media and that were confirmed experimentally in related structures. A computationally efficient method will be applied for the first time to the study of these topological features.
b. Demonstrate the existence and realization of type I Weyl points in the helical wire media.
c. Provide the first experimental verification of the predicted topological feature of types I and II Weyl points in the helical wire medium and its associated protected surface states, characterizing their robustness in detail.
d. Theoretically demonstrate the capability of the Weyl points to tune the spontaneous emission in these media.
Reference: UIDB/50008/2020
Funding: FCT
Start Date: 01-02-2020
End Date: 31-01-2023
Team: Tiago André Nogueira Morgado, Paloma Arroyo Huidobro, David Emanuel Dias Fernandes, Filipa Isabel Rodrigues Prudêncio, Sylvain Arnaud Lannebere
Groups: Antennas and Propagation – Co, Antennas and Propagation – Lx
Partners: There is no partners
Local Coordinator: Tiago André Nogueira Morgado

Associated Publications
  • 4Papers in Journals
  • D. E. Fernandes, S. Lannebère, T. A. Morgado, High Q-factor Fano resonances in coupled wire arrays with bulk structural asymmetry, Physical Review B - Condensed Matter and Materials Physics, Vol. 109, No. 8, pp. 085123-1 - 085123-12, February, 2024,
    | Abstract
    | BibTex
  • T. A. Morgado, G. João, R. A. M. Pereira, D. E. Fernandes, S. Lannebère, Experimental verification of magnetic near-field channeling using a helical-shaped wire medium lens, Applied Physics Letters, Vol. 122, No. 23, pp. 231704-1 - 231704-6, June, 2023,
    | Abstract
    | BibTex
  • M.S. Rider Rider, A. B. buendia, D. A. Abujetas, P. Huidobro, J. A. S. G. Sanchez-Gil, V. Giannini, Advances and Prospects in Topological Nanoparticle Photonics, ACS Photonics, Vol. 9, No. 5, pp. 1483 - 1499, May, 2022 | BibTex
  • E. Galiffi, P. Huidobro, J. B. P. Pendry, An Archimedes' screw for light, Nature Communications, Vol. 13, No. 1, pp. 1 - 9, May, 2022 | BibTex