Manufacturing method of perfect magnetic dipole/electric dipole nano antenna based on second harmonic

Abstract

The invention discloses a manufacturing method of a perfect magnetic dipole / electric dipole nano antenna based on second harmonics and belongs to the technical field of nano photons. The manufacturingmethod of the nano antenna comprises the following steps that: a nano antenna with a metal-dielectric-metal classic sandwich structure is manufactured; laser vertically enters the bottom surface of the nano antenna, so that laser pumping can be generated; perfect magnetic dipole scattering is generated through the nonlinear response of second harmonic generated by the laser pumping; on the basisof the step S2, perfect electric dipole scattering is generated by adjusting an included angle between incident polarization and the x axis of a dielectric layer. According to the nano antenna disclosed by the invention, second harmonic emission is controlled by adjusting the incident polarization, so that 99.2% of perfect magnetic dipole and perfect electric dipole scattering is realized at different wavelength positions. The optimized hybrid nanodisk dimer structure is simple to manufacture, can effectively gather incident field energy, enhance the conversion efficiency of the second harmonic, and assist in reducing a mode volume.

Description

technical field [0001] The invention relates to the field of nanophoton technology, in particular to a method for manufacturing a perfect magnetic dipole / electric dipole nano-antenna based on a second harmonic. Background technique [0002] Nano-optical antennas can control light in the sub-wavelength range, thereby realizing the processing and propagation of optical information at the nanoscale. The currently researched nanoantennas are mainly metal nanoantennas based on surface plasmon resonance. The core-shell structure that produces perfect magnetic dipole / electric dipole scattering is complex and requires high processing technology. Therefore, how to process efficiently and accurately Various materials have also become the key to making nano-antennas. [0003] As a medium of electromagnetic waves, nano-antennas can realize mutual conversion between electromagnetic waves and local fields. Traditional nanoantennas use linear optical response to generate magnetic dipole ...

AI Technical Summary

Problems solved by technology

[0006] Compared with the plasmonic system, although the high-refractive index dielectric nanostructure has higher second harmonic conversion efficiency, it generally has a large mode volume, which makes the dielectric volume for enhancing the second harmonic emission larger, Not conducive to the design of nonlinear nanophotonic devices with ultra-high integration

In addition, the high-refractive index dielectric nanoantenna has very complex multi-level scattering contributions at the harmonic wavelength, which makes the spatial distribution of its second harmonic far-field emission very complex, and it is difficult to realize the nonlinear far-field emission. controllable modulation

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