Non-scattering Metasurface-bound Cavities for Field Localization, Enhancement, and Suppression

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Francisk Skorina Gomel State University
  • St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)

Abstract

We propose and analyse metasurface-bound invisible (non-scattering) partially open cavities where the inside field distribution can be engineered. It is demonstrated both theoretically and experimentally that the cavities exhibit unidirectional invisibility at the operating frequency with enhanced or suppressed field at different positions inside the cavity volume. The non-scattering mode excited in the proposed cavity is driven by the incident wave and resembles an ideal bound state in the continuum of electromagnetic frequency spectrum. In contrast to known bound states in the continuum, the mode can stay localized in the cavity infinitely long, provided that the incident wave illuminates the cavity. The non-scattering properties can be exploited for a straightforward implementation of multi-layer resonators with adaptive field localization. Several examples of applications of the designed cavities are proposed and analyzed, in particular, cloaking sensors and obstacles, enhancement of emission, and “invisible waveguides”.

Details

Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
Publication statusE-pub ahead of print - 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Bound states, metasurface, cloaking, driven bound states, field localization, invisible resonators, zero-phase transmission, invisible waveguides, multi-layer resonators

ID: 36779801