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A transverse mim lattice lattice plasmonic absorber

A plasmon and absorber technology, applied in the field of micro-nano optics, can solve the problems of confinement enhancement and short plasma duration, and achieve the effects of strong local electric field enhancement, high quality factor and absorption coefficient, and simple structure

Active Publication Date: 2022-04-29
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the short plasma duration and low quality factor of LSPR limit the enhancement of local field strength and light-matter interaction

Method used

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  • A transverse mim lattice lattice plasmonic absorber
  • A transverse mim lattice lattice plasmonic absorber
  • A transverse mim lattice lattice plasmonic absorber

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Embodiment Construction

[0024] The present invention will be further explained below in conjunction with the accompanying drawings and this embodiment.

[0025] figure 1 Shown is a schematic diagram of the three-dimensional structure of the transverse MIM lattice lattice plasmon absorber. Including a dielectric substrate 2 with a refractive index n=1.52, two gold cuboid blocks facing each other and each group of metal nanoparticles 1 composed of a layer of medium (air) in between, the length of the two gold cuboid blocks is parallel to the Y axis, and the width is parallel to the Y axis. x-axis. Each group of metal nanoparticles is distributed periodically along the X-axis and Y-axis on the medium substrate to form a metal nanoparticle array, and the thickness of the medium substrate in the present invention only needs to meet the working conditions. The incident light is a plane wave, the wave vector k is in the YZ plane and the angle between the incident direction and the Z axis is θ, and the pol...

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Abstract

The invention is a transverse MIM lattice lattice plasmon absorber, which is composed of a dielectric substrate and a periodic array of metal nanoparticles, and each group of metal nanoparticles consists of two opposite gold cuboid blocks and a gold cuboid between them. Medium layer composition. The incident light is a TM plane wave whose magnetic field direction is parallel to the medium substrate plane, and its wave vector k has a certain angle with the vertical direction, so that the lattice plasmons in the form of OLP can be excited in the metal nanoparticle array, and the adjacent Strong resonant coupling will be generated between the nano-metal units, and specific absorption peaks will be generated for incident light under specific structural parameters and incident angles. And compared with other array-based plasmonic absorbers, which have a high quality factor and good tunability, the lateral MIM lattice lattice plasmonic absorber has a good performance in the field of micro-nano optical integrated devices. application prospects.

Description

(1) Technical field [0001] The invention belongs to the field of micro-nano optics technology, and relates to exciting lattice plasmons in a metal nanoparticle array by obliquely incident TM light waves, in particular to a transverse MIM lattice plasmon absorber. (2) Background technology [0002] Plasmonic nanostructures have attracted increasing attention due to their ability to concentrate light in a small area, thereby greatly enhancing the light-matter interaction. A single metal nanoparticle can support localized surface plasmon resonance (LSPR ), with a large local field enhancement. However, the short plasmon duration and low quality factor of LSPR limit the enhancement of local field strength and light-matter interaction. However, due to the strong coupling between adjacent nanoparticles, the lattice plasmons supported by metal nanoparticle arrays combine ideal photonic and plasmonic properties, and are effective in suppressing radiative losses, high quality factor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00
CPCG02B5/008G02B5/003
Inventor 肖功利杨文琛薛淑文杨宏艳杨寓婷张开富李海鸥
Owner GUILIN UNIV OF ELECTRONIC TECH
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