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Borophene-Based Anisotropic Metamaterial Perfect Absorber for Refractive Index Sensing
Zichen Lin1, Haorui Yang1, Gui Jin2
1School of Microelectronics, Changzhou University, Changzhou 213164, China.
Nanomaterials (Basel, Switzerland)
|April 11, 2025
Summary
This study introduces a novel borophene metamaterial perfect absorber with triple-band absorption. Its resonant wavelengths are tunable, showing high sensitivity for refractive index sensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Borophene, a 2D material, exhibits unique optoelectronic properties.
- Anisotropic metamaterials offer advanced electromagnetic wave manipulation.
- Perfect absorbers are crucial for various sensing and detection technologies.
Purpose of the Study:
- To theoretically propose and analyze a borophene-based anisotropic metamaterial perfect absorber.
- To investigate the tunability of absorption characteristics.
- To explore the application of the perfect absorber in refractive index sensing.
Main Methods:
- Finite-Difference Time-Domain (FDTD) method for theoretical simulation.
- Analysis of electromagnetic absorption under different polarization conditions.
- Investigation of refractive sensing performance based on carrier density.
Main Results:
- The proposed metamaterial demonstrates triple-band perfect electromagnetic absorption.
- Absorption wavelengths are tunable by adjusting borophene's carrier mobility.
- High refractive index sensitivity (867 nm/RIU) and figure of merit (11.71 RIU⁻¹) were achieved.
Conclusions:
- Borophene-based metamaterials can be designed as efficient perfect absorbers.
- The tunable absorption and high sensing performance suggest potential in biochemical and environmental detection.
