Role of Magnetic Plasmon Resonance in Plasmonic Electromagnetically-Induced Transparency

TL;DR

This paper investigates the role of magnetic plasmon resonance in plasmonic electromagnetically-induced transparency (EIT) and proposes a scheme for active plasmonic switching controlled by incident angle adjustments.

Contribution

It highlights the importance of magnetic plasmon resonance in plasmonic EIT and introduces a new tunable scheme for active plasmonic switching using a single optical field.

Findings

Magnetic plasmon resonance significantly influences plasmonic EIT.

A modified scheme enables tunable plasmonic EIT via incident angle control.

The proposed method allows effective active plasmonic switching.

Abstract

We find that the magnetic plasmon resonance plays a vital role in plasmonic electromagnetically-induced transparency (EIT) proposed by Zhang et al. [\prl \textbf{101}, 047401 (2008)] as well as the localized surface plasmon polaritons. Based on this picture, the plasmonic EIT control through single optical field is suggested in a modified scheme for active plasmonic switching by simply adjusting the incident angle of the optical field. The tunability of plasmonic EIT in this scheme is exhibited sufficiently.