An artificial localized surface plasmon electromagnetic co-frequency resonator

Abstract

The invention discloses an artificial local area surface plasmon electromagnetic co-frequency resonator. The artificial local area surface plasmon electromagnetic co-frequency resonator comprises a dielectric layer, a front metal layer and a back metal layer, wherein the front metal layer and the back metal layer are located at the upper surface and lower surface of the dielectric layer respectively; the front metal layer comprises a metal disc located at the central area and a first metal spiral structure; the back metal layer comprises a circular groove located at the central area and a second metal spiral structure; each of the first metal spiral structure and the second metal spiral structure comprises N spiral metal arms, wherein N is an integer larger than 2; the head ends of the spiral metal arms are uniformly distributed on the circumference of the metal disc or the circular groove; and the tail ends of the spiral metal arms in the first metal spiral structure are in one-to-onecorrespondence with the tail ends of the spiral metal arms in the second metal spiral structure, and are connected through metal through holes in the dielectric layer. With the artificial local areasurface plasmon electromagnetic co-frequency resonator of the invention adopted, the co-frequency resonance of electric dipoles and magnetic dipoles is realized, the one-way scattering effect of artificial local area surface plasmon waves is realized. The artificial local area surface plasmon electromagnetic co-frequency resonator has the advantages of simple structure, miniaturization and easiness in manufacturing.

Description

Technical field[0001]The present invention relates to a resonator, and more particularly to an artificial local surface plasma resonator.Background technique[0002]Local surface plasmine is a local area-type electromagnetic surface wave pattern that is bound to the surface of the metal particles, which is generated by the interaction of light and metal surface free electrons, and is negative in metal (optical wavelength dielectric constant) ) Form a strong enhancement effect of surface field near the interior of the media. However, since the plasma frequency of the metal is generally in the ultraviolet band, the metal is approximately an ideal conductor at a low frequency band (microwave or terahertz band). In this case, the metal surface is unable to stimulate the local surface plasma wave, thereby limiting its further development. In order to promote local surface plasmines to low frequency sections, Professor Pendry, the UK Empire Institute of Technology, proposed the concept of a...

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Problems solved by technology

[0003] Purpose of the invention: To overcome the problem that traditional localized or artificial localized surface plasmon resonators cannot excite electric resonance and magnetic resonance at the same frequency at the same time in the prior art, and provide an artificial localized surface plasmon electromagnetic co-frequency The resonator makes the electric dipole and the magnetic dipole resonate at the same frequency point, realizing the same frequency superposition of electromagnetic resonance and the one-way scattering characteristic of electromagnetic waves

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