Mode coupling in metal-coated microsphere
Related Experiment Video
Updated: Mar 18, 2026

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
Abstract:
Mode coupling characteristics in metal-coated microsphere are comprehensively studied by analytical method with Mie theory. The dispersion relation, field distribution and Q factor of the eigenmodes are calculated according to the modal eigenequation. In metal-coated microcavity, symmetric SPP mode can couple with asymmetric SPP mode and TM eigenmodes strongly at the different characteristic radius of microsphere. In the coupling range, the generated supermode possesses both high Q factor and high surface enhancement factor, which is expected to have many interesting potential applications. Furthermore, the sensitivity and figure of merit of supermode in biochemical sensing applications has been studied. The results show that both high sensitivity and large figure of merit can be achieved simultaneously.
More Related Videos
Related Concept Videos
¹H NMR: 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...
Biasing of Metal-Semiconductor Junctions
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
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...
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Metal-Semiconductor Junctions
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Magnetic Damping
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...

