Tunable Plasmon-Induced Transparency through Bright Mode Resonator in a Metal–Graphene Terahertz Metamaterial

Abstract

The combination of graphene and metamaterials is the ideal route to achieve active control of the electromagnetic wave in the terahertz (THz) regime. Here, the tunable plasmon-induced transparency (PIT) metamaterial, integrating metal resonators with tunable graphene, is numerically investigated at THz frequencies. By varying the Fermi energy of graphene, the reconfigurable coupling condition is actively modulated and continuous manipulation of the metamaterial resonance intensity is achieved. In this device structure, monolayer graphene operates as a tunable conductive film which yields actively controlled PIT behavior and the accompanied group delay. This device concept provides theoretical guidance to design compact terahertz modulation devices.

Control with EIT: High Energy Charged Particle Detection

“…The bandwidth for the coherent group mode is limited by the EIT linewidth Γ ′ and adjusting the control Rabi frequency Ω 2 is one way to broaden the linewidth, decrease dissipation and increase coherence times. The axial and radial group velocities are determined using ( 22) and ( 6) which can then be used to find any critical points satisfying (13) and then get the radiant power density (23). We can then optimise the power density for a train of high energy particles associated with some distribution of arrival times.…”

“…Graphene metamaterials have seen wide applications in this field due to its low-loss, shiftable Fermi energies and electronic properties. A number of different geometrical approaches have theoretically showed PIT [23,24] in the THz regime and this phenomena's applicability to quantum control. Due to the geometry of the resonators, spacings in the metamaterial, and properties of the graphene layer give high controllability for the electromagnetic response.…”