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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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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.

Keywords:

Dual-band Waveguide Graphene Line waves Metasurfaces Non-Hermitian line waves

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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Published on: August 30, 2012

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.