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Near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators

A technology of absorbers and nanopillars, applied to antennas, electrical components, etc., can solve problems such as inability to achieve continuous control

Active Publication Date: 2019-08-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the wide bandwidth of existing thermo-optic tunable meta-absorbers (generally only up to a few hundred nanometers) and thermo-optic tunability can only be adjusted by switching between the "on" and "off" states, The problem that continuous control cannot be realized, the present invention provides a near-infrared band linear thermo-optic tunable ultra-narrow-band absorber based on four nanocolumn coupled oscillators, the absorber can obtain an ultra-narrow absorption band in the near-infrared band and absorb The belt has a linear thermo-optic adjustment function, and the technical scheme adopted is as follows:

Method used

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  • Near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators
  • Near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators
  • Near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators

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Embodiment 1

[0025] Such as figure 1 , figure 2 and image 3 As shown, this embodiment provides a near-infrared band linear thermo-optic tunable ultra-narrow band absorber based on four nanocolumn coupled oscillators, the absorber includes a plurality of periodic structural units, each of which is three Layer structure, the bottom layer is a gold film, the middle layer is a silicon nitride film, and the top layer is a vibrator composed of four nanocolumns coupled and the material of the vibrator is amorphous silicon material (also known as a four nanocolumn coupled amorphous silicon vibrator). In this embodiment, the four nano-columns are arranged and coupled in a 2×2 manner, and the four nano-columns are all cuboids, and their upper and lower bottom surfaces are square. Specifically, the following parameters are adopted: the thickness of the gold film at the bottom layer is T3=200nm, the thickness of the silicon nitride dielectric in the middle is T2=350nm, the period of the structural...

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Abstract

The invention discloses a near-infrared band linear thermo-optic adjustable ultra-narrow band absorber based on four-nanocolumn coupling oscillators, which belongs to the technical field of superstructure material absorbers. The absorber comprises multiple periodic structural units. Each periodic structural unit is of a three-layer structure, wherein the bottom layer is a metal film, the middle layer is a dielectric film, and the top layer is an oscillator formed by coupling four nano-columns made of amorphous silicon. By adopting the four-nano-column coupled amorphous silicon oscillators, theabsorber can form an ultra-narrow absorption band in the near-infrared band, and thus, the design of a near-infrared band linear thermo-optic adjustable ultra-narrow absorber is realized. The absorber of the invention can be applied to micro optical switches, optical regulators and infrared camouflage.

Description

technical field [0001] The invention relates to a near-infrared band linear thermo-optic tunable ultra-narrow-band absorber based on four nano-column coupled oscillators, and belongs to the technical field of metamaterial absorbers. Background technique [0002] Metamaterial absorbers are a new type of artificial electromagnetic metamaterials, which have many potential applications in energy conversion and harvesting, imaging, sensing and detection. The structure of the meta-absorbers usually studied is a three-layer sandwich structure of metal-dielectric-metal. The bottom is a metal film, the middle layer is a dielectric film, and the top is a periodic metal oscillator. The metamaterial absorber can form close to 100% absorption in a certain wavelength band, and the physical principle can be explained by the effective medium theory. The periodically arranged oscillators on the top layer can excite electric plasmon resonance and magnetic plasmon resonance, and adjust the e...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
CPCH01Q17/00H01Q17/008
Inventor 董士奎赵磊贺志宏帅永冯颖孟夏莹
Owner HARBIN INST OF TECH
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