Dynamically configurable successively switchable multispectral plasmon induced transparency

TL;DR

This paper presents a theoretical study of a novel plasmonic metasurface that enables all-optically tunable, multispectral transparency with successively switchable channels, advancing dynamic nanophotonics applications.

Contribution

It introduces a new nanostructure design that achieves sequential, polarization-selective control of multiple transparency windows at optical frequencies.

Findings

Successive control of up to 3 transparency channels.

Demonstration of polarization-selective multispectral operation.

Potential for active manipulation in nanophotonic devices.

Abstract

Plasmon-induced-transparency (PIT) in nanostructures has been intensively investigated, however, no existing metasurface nanostructure exhibits all-optically tunable properties, where the number of transparency windows can be tuned successively, and switched to off-state. Here, we theoretically investigate and demonstrate dynamically tunable, multichannel PIT at optical frequencies. The inplane destructive interference between bright and dark dipolar resonances in coupled plasmonic nanobar topologies is exploited to produce tunable PIT with unique characteristics. In particular, we demonstrate sequential polarization-selective multispectral operation whereby the number of PIT channels can be varied successively from '3' to '0'. The results provide a promising route for active manipulation of PIT and show potential applications for multifunctional dynamic nanophotonics devices.