Related Experiment Video
Updated: Mar 7, 2026
06:34
Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
6.4K
Strong coupling in hybrid metal-dielectric nanoresonators
Summary
We explored strong coupling between gold nanoantennas and silicon nanodiscs, observing clear mode hybridization. Hybrid nanostructures offer tunable light control, surpassing purely metallic or dielectric designs.
Area of Science:
- Nanophotonics
- Plasmonics
- Metamaterials
Background:
- Photonic-plasmonic coupling is crucial for advanced optical devices.
- Silicon nanodiscs support electric and magnetic Mie resonances.
- Gold nanoantennas exhibit plasmonic resonances.
Purpose of the Study:
- Investigate resonant coupling between a gold dipole nanoantenna and a silicon nanodisc.
- Analyze mode hybridization under different silicon nanodisc resonance conditions.
- Demonstrate enhanced control over light transmission, absorption, and reflection.
Main Methods:
- Simulating resonant coupling between gold nanoantennas and silicon nanodiscs.
- Analyzing spectral overlap of electric and magnetic dipolar Mie resonances.
- Examining mode profiles to identify hybridization signatures.
Main Results:
- Observed anticrossing between plasmonic dipole and magnetic Mie resonances.
- Confirmed photonic-plasmonic mode hybridization in the hybrid nanostructure.
- Demonstrated superior flexibility in tailoring optical properties (transmission, absorption, reflection) compared to single-material nanostructures.
Conclusions:
- Strong coupling is achievable in hybrid metal-dielectric nanoresonators.
- Hybrid nanostructures provide greater control over light-matter interactions.
- These systems offer tunable asymmetric optical responses.
Related Concept Videos
01:27¹H NMR: Long-Range Coupling
2.8K
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...
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...
2.8K
01:27Biasing of Metal-Semiconductor Junctions
733
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
733
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
01:18Capacitor With A Dielectric
5.1K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
5.1K
01:12Double Resonance Techniques: Overview
827
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...
827
01:17Spin–Spin Coupling: One-Bond Coupling
1.6K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.6K