Device and method for realizing electric regulation and control of Fano resonance based on asymmetric split-ring resonators

Abstract

The invention relates to a device and a method for realizing electric regulation and control of Fano resonance based on asymmetric split-ring resonators. A variable capacitance diode is embedded in the middle of each of the two split-ring resonators, and meanwhile, feeding wires are added to the upper side and lower side of the two split-ring resonators respectively; the feeding wires are connected with an external power supply and adjust the voltage at the two ends of the variable capacitance diode; and inductors are added between the feeding wires and the split-ring resonators respectively to isolate the influence of the feeding wires on the electromagnetic response of the metamaterial structure. The working state of the variable capacitance diode is adjusted by using the feed voltage, and then the working frequencies of the two split-ring resonators are adjusted, so that dynamic modulation of the Fano resonance transmission spectral line is realized. The two split-ring resonators are different in size, the asymmetric structure is utilized to excite a magnetic four-level mode, and destructive interference occurs between the magnetic four-level mode and a magnetic dipole mode excited by an electric field, so that the transmission spectral line shows a Fano resonance line type.

Description

technical field [0001] The invention belongs to a device for Fano resonance, and relates to a device and method for electrically controlling Fano resonance based on an asymmetric split resonant ring, in particular to a device and method for electrically controlling Fano resonance based on an asymmetric split resonant ring supplemented by a varactor diode installation. Background technique [0002] In an atomic system, interference will occur when a continuous state and a discrete state energy level are superimposed on each other, so that the spectral lines of the atomic system show an asymmetric line shape. This phenomenon is also called Fano resonance. The spectral line of Fano resonance usually has an asymmetric line shape, and due to its strong dispersion effect, it is often accompanied by high-quality factor resonance, so it has potential applications in biosensing, nonlinear enhancement and other fields. In recent years, researchers have ingeniously designed artificial...

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a device and method based on an asymmetrical split resonant ring to realize electrical control of Fano resonance, which solves the problems of complex structure and single operating frequency of traditional metamaterial devices, and discloses a device based on The asymmetric split resonant ring realizes the Fano resonance, and it is supplemented by two varactor diodes through the change of the external bias voltage to dynamically control the design idea and implementation method of the Fano resonance operating frequency

Images