Related Experiment Video
Updated: Jun 26, 2026
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.3K
Dynamically tunable multi-band plasmon-induced absorption based on multi-layer borophene ribbon gratings
Yizhao Pan1, Yuchang Li1, Fang Chen1
1Institute of Quantum Optics and Information Photonics, School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, P. R. China. chenfang@yangtzeu.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|April 17, 2024
Summary
This study introduces a novel borophene-based grating structure for multi-band plasmon-induced absorption. The proposed metamaterial achieves near-perfect absorption across multiple frequencies, offering advantages over existing 2D materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanophotonics
Background:
- Plasmon-induced absorption is crucial for optical devices.
- Existing 2D materials like graphene have limitations for multi-band perfect absorbers.
- Borophene offers unique properties for advanced metamaterial applications.
Purpose of the Study:
- To propose and investigate a borophene-based grating structure (BBGS) for multi-band plasmon-induced absorption.
- To demonstrate a three-band perfect absorber using a three-layer borophene grating.
- To analyze the influence of structural parameters and material properties on absorption.
Main Methods:
- Coupled-mode theory (CMT) for spectral analysis.
- Numerical simulations of the borophene-based grating structure.
- Investigation of carrier density, coupling distance, polarization, and relaxation time effects.
Main Results:
- The BBGS achieves coupled resonance modes for plasmon-induced absorption.
- Simulated absorption spectra align well with CMT calculations.
- A three-layer structure demonstrated three-band perfect absorption (99.83%, 99.45%, 99.96%) in the near-infrared region.
- Absorption peaks show distinct shifts with changes in carrier density and coupling distance.
Conclusions:
- Borophene is a promising material for developing high-performance multi-band perfect absorbers.
- The proposed BBGS design offers tunable absorption properties.
- This work paves the way for advanced optical applications utilizing borophene metamaterials.
Related Concept Videos
01:27π Electron Effects on Chemical Shift: Overview
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
01:27¹H NMR: Long-Range Coupling
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
01:04¹³C NMR: ¹H–¹³C Decoupling
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
01:28Induced Electric Dipoles
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...