Magnetic Mode Coupling in Hyperbolic Bowtie Meta-Antennas

Ebrahimi, Sema; Muravitskaya, Alina; Adawi, Ali M.; Baudrion, Anne Laure; Adam, Pierre Michel; Bouillard, Jean Sebastien G.

Abstract

Hyperbolic metaparticles have emerged as the next step in metamaterial applications, providing tunable electromagnetic properties on demand. However, coupling of optical modes in hyperbolic meta-antennas has not been explored. Here, we present in detail the magnetic and electric dipolar modes supported by a hyperbolic bowtie meta-antenna and clearly demonstrate the existence of two magnetic coupling regimes in such hyperbolic systems. The coupling nature is shown to depend on the interplay of the magnetic dipole moments, controlled by the meta-antenna effective permittivity and nanogap size. In parallel, the meta-antenna effective permittivity offers fine control over the electrical field spatial distribution. Our work highlights new coupling mechanisms between hyperbolic systems that have not been reported before, with a detailed study of the magnetic coupling nature, as a function of the structural parameters of the hyperbolic meta-antenna, which opens the route toward a range of applications from magnetic nanolight sources to chiral quantum optics and quantum interfaces.

Citation

Ebrahimi, S., Muravitskaya, A., Adawi, A. M., Baudrion, A. L., Adam, P. M., & Bouillard, J. S. G. (2023). Magnetic Mode Coupling in Hyperbolic Bowtie Meta-Antennas. Journal of Physical Chemistry Letters, 14(35), 7824-7832. https://doi.org/10.1021/acs.jpclett.3c01620

• Journal Article Type: Article
• Acceptance Date: Aug 2, 2023
• Online Publication Date: Aug 25, 2023
• Publication Date: Sep 7, 2023
• Deposit Date: Sep 5, 2023
• Publicly Available Date: Sep 7, 2023
• Journal: Journal of Physical Chemistry Letters
• Electronic ISSN: 1948-7185
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 35
• Pages: 7824-7832
• DOI: https://doi.org/10.1021/acs.jpclett.3c01620
• Keywords: Electrical properties; Fill factor; Gold; Magnetic properties; Metamaterials
• Public URL: https://hull-repository.worktribe.com/output/4376118