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Line-wave waveguide engineering using Hermitian and non-Hermitian metasurfaces.
Haddi Ahmadi1, Zahra Ahmadi2, Nasrin Razmjooei3
1Department of Electrical Engineering, Sharif University of Technology, 11155-4365, Tehran, Iran.
Scientific Reports
|March 8, 2024
Summary
This study introduces a novel dual-band waveguide for line waves (LWs), enabling their propagation in terahertz and infrared spectra. A new non-Hermitian platform using graphene metasurfaces is proposed for practical LW applications.
Area of Science:
- Electromagnetism
- Metamaterials Science
Background:
- Line waves (LWs) are confined edge modes propagating along dual electromagnetic metasurface interfaces with mirror reflection symmetries.
- Previous research confirmed LWs in microwave and terahertz frequencies, exploring non-Hermitian LWs via parity-time symmetry.
- Existing LW applications have been analyzed, highlighting the need for novel platforms.
Purpose of the Study:
- To introduce a dual-band line-wave waveguide for terahertz and infrared spectrums.
- To propose and analyze a novel non-Hermitian platform for practical line-wave implementation.
- To investigate the advantages of the proposed graphene-based metasurface on epsilon-near-zero material framework.
Main Methods:
- Theoretical analysis and numerical simulations of wave propagation.
- Implementation of a dual-band waveguide structure.
- Fabrication of a graphene-based metasurface on an epsilon-near-zero material.
Main Results:
- Successful realization of line waves in the terahertz and infrared spectrums using the proposed waveguide.
- Demonstration of a feasible non-Hermitian platform for line wave applications.
- Comparative analysis showing advantages of the proposed framework over existing structures.
Conclusions:
- The proposed dual-band waveguide and non-Hermitian platform offer a promising avenue for advanced line wave applications.
- The graphene-based metasurface on epsilon-near-zero material provides a practical and advantageous solution for non-Hermitian line waves.
- Further research into the underlying physical mechanisms and potential applications is warranted.
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