Related Experiment Video
Updated: Nov 23, 2025
08:48
Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
Published on: September 25, 2020
6.0K
Terahertz multifunction switch and optical storage based on triple plasmon-induced transparency on a single-layer
Optics Express
|December 31, 2020
Summary
This study introduces a novel terahertz metasurface capable of triple plasmon-induced transparency (triple-PIT), enabling multifunction switches and optical storage with excellent performance metrics.
Area of Science:
- * Metamaterials and Nanophotonics
- * Terahertz (THz) Technology
- * Plasmonics
Background:
- * Conventional terahertz devices often face limitations in functionality and efficiency.
- * Achieving tunable and high-performance terahertz switches and optical storage remains a significant challenge.
- * Plasmon-induced transparency (PIT) offers a promising avenue for manipulating light-matter interactions in metasurfaces.
Purpose of the Study:
- * To propose and numerically investigate a novel terahertz metasurface for multifunction switching and optical storage.
- * To demonstrate the generation of significant triple plasmon-induced transparency (triple-PIT) using a graphene-based metasurface.
- * To explore the tunability of the metasurface for achieving asynchronous and synchronous frequency switches.
Main Methods:
- * Design of a terahertz metasurface composed of a graphene ribbon and three graphene strips.
- * Numerical simulations to analyze the triple-PIT phenomenon and its underlying mechanisms.
- * Application of coupled mode theory (CMT) to model and understand the observed triple-PIT.
- * Modulation of graphene Fermi levels to control the switching characteristics.
Main Results:
- * Achieved significant triple plasmon-induced transparency (triple-PIT) through destructive interference of multiple plasmon modes.
- * Demonstrated penta-frequency asynchronous and quaternary-frequency synchronous switches by tuning graphene Fermi levels.
- * Exhibited excellent switch performance with high modulation depth (83.5% < MD < 93.5%) and low insertion loss (0.10 dB < IL < 0.26 dB).
- * Attained a high group index (up to 935) for optical storage applications.
Conclusions:
- * The proposed graphene metasurface effectively realizes a multifunction switch and optical storage device.
- * The triple-PIT phenomenon provides a robust mechanism for achieving tunable terahertz functionalities.
- * This work presents a novel and efficient approach for designing advanced terahertz devices.
