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Updated: Jul 25, 2025
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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A multi-physical quantity sensor based on a layered photonic structure containing layered graphene hyperbolic
Jie Xu1, Zhao Tang1, You Ran Wu1
1College of and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China. hanlor@163.com.
Physical Chemistry Chemical Physics : PCCP
|June 26, 2023
Summary
This study introduces a novel layered photonic structure (LPS) sensor using graphene for terahertz (THz) detection. The Janus metastructure design enables multi-dimensional sensing of various substances and physical parameters with high sensitivity and angle-insensitivity.
Area of Science:
- Photonics and Metamaterials
- Terahertz (THz) Sensing Technology
- Graphene-based Devices
Background:
- Layered photonic structures (LPS) offer potential for enhanced light-matter interactions.
- Graphene's unique electromagnetic properties make it suitable for terahertz (THz) applications.
- Janus metastructures provide directional asymmetry for novel sensing capabilities.
Purpose of the Study:
- To develop a multi-dimensional sensor utilizing graphene and a Janus metastructure in the THz range.
- To investigate the sensor's ability to detect glucose, alcohol, applied voltage, hyperbolic metamaterial (HM) thickness, and temperature.
- To enhance sensor performance through structural optimization and angle-insensitive design.
Main Methods:
- Fabrication of a layered photonic structure (LPS) sensor incorporating graphene.
- Utilizing the intrinsic absorption principle of graphene for THz absorption peak generation.
- Designing a Janus metastructure with non-stacked media for directional sensing properties.
- Employing the particle swarm optimization (PSO) algorithm for structural parameter optimization.
Main Results:
- The sensor achieved high sensitivity (S) of 940.34 THz/RIU for voltage detection.
- Demonstrated significant sensitivity for glucose (5.52 THz/RIU) and alcohol (4.44 THz/RIU) solutions.
- Exhibited angle-insensitive characteristics due to hyperbolic metamaterials (HM).
- Achieved high quality factor (Q) and figure of merit (FOM) values for various detection parameters.
Conclusions:
- The developed LPS sensor with Janus metastructure and graphene offers versatile multi-dimensional sensing in the THz range.
- The PSO-optimized design provides excellent sensitivity, resolution, and angle-insensitivity.
- This single device demonstrates the potential for detecting multiple substances and physical quantities, enhancing structural utility.
