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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Graphene-based multifunctional three-port THz and long-wave infrared components
Applied Optics
|June 17, 2020
Summary
Two novel graphene T-shaped components function as versatile THz and long-wave infrared devices. These components act as dividers and switches, with one offering dynamic filtering capabilities controlled electrostatically.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Graphene's unique electronic and optical properties enable novel device functionalities.
- Terahertz (THz) and long-wave infrared (LWIR) technologies require efficient and controllable components.
Purpose of the Study:
- To propose and analyze two graphene-based T-shaped multifunctional components.
- To demonstrate their capabilities as dividers, switches, and filters in the THz and LWIR regions.
Main Methods:
- Utilizing numerical simulations to analyze surface plasmon-polariton wave propagation in graphene waveguides and resonators.
- Designing T-junctions with circular graphene resonators and waveguides on a SiO2/Si substrate.
- Investigating electrostatic field control of graphene Fermi energy for dynamic switching.
Main Results:
- The first component, featuring a circular resonator, acts as a switchable divider with -4.3 dB transmission and 9.5% FWHM in the ON state.
- High isolation of -30 dB is achieved in the OFF state for the first component.
- The second component, a resonator-less T-junction, functions as a broadband divider-switch over an octave frequency band.
Conclusions:
- Graphene T-shaped components offer promising solutions for THz and LWIR applications.
- Dynamic control via electrostatic gating enables versatile device operation.
- The proposed designs pave the way for advanced optoelectronic integrated circuits.
