Asymmetric metamaterial capable of enhancing absorption by fanno resonance on near-infrared band

A Fano resonance and asymmetric technology, applied to antennas, electrical components, etc., can solve the problems of limited size, high production cost, and increased difficulty of production process, etc., to achieve enhanced electromagnetic wave collection effect, enhanced absorption, and enhanced photoelectric conversion capability Effect

Inactive Publication Date: 2016-07-06
CHONGQING UNIV
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Problems solved by technology

This type of absorber has complex structural design, limited size and area, and high manufacturing cost, making it difficult to effectively promote and apply this type of absorber
[0003] Some researchers broaden the absorption bandwidth by combining resonant

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  • Asymmetric metamaterial capable of enhancing absorption by fanno resonance on near-infrared band
  • Asymmetric metamaterial capable of enhancing absorption by fanno resonance on near-infrared band
  • Asymmetric metamaterial capable of enhancing absorption by fanno resonance on near-infrared band

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0028] see figure 1 , an asymmetric metamaterial that can use Fano resonance to enhance absorption in the near-infrared band, including a dielectric layer 1 and a metal layer 2, and a resonator A and a resonator B with the same shape;

[0029] In the embodiment, the metal layer 2 is formed on a glass substrate, the material of the glass substrate is glass, the thickness is 2 microns, the width is 1 micron, and the length is 1 micron;

[0030] The material of the metal layer 2 is gold, the thickn...

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Abstract

The invention discloses an asymmetric metamaterial capable of enhancing absorption by a fanno resonance on a near-infrared band. A resonant element of the metamaterial is removed from the center position thereof and rotated at an angle; and the transmission property of the resonant element on an electromagnetic wave is changed, so that an original dipole is changed into a quadrupole; and the resonance is enhanced. A sharp fanno resonance with a high-quality factor is formed on the near-infrared band, so that absorption on a near-infrared light is enhanced. The asymmetric metamaterial can be applied to the fields of a photocell, a slow light, sensing, nonlinearity, a photoswitch and the like.

Description

technical field [0001] The invention relates to a near-infrared wave absorbing material. Background technique [0002] Traditional near-infrared wave absorbers are usually based on the resonance absorption of a single frequency band produced by a single-sized plasmonic resonance structure, and the resonance of two or more discrete frequency bands produced by two or more complex plasmonic resonance structures of different sizes absorb. This type of absorber has complicated structural design, limited size and area, and high manufacturing cost, making it difficult to effectively popularize and apply this type of absorber. [0003] Some researchers broaden the absorption bandwidth by combining resonant units with different resonant frequency bands to obtain multiple absorption bands, but this further increases the difficulty of the manufacturing process and reduces the repeatability of production, which limits the practicability of this type of absorber. . Contents of the in...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 喻洪麟方佳文康治平何安国宋茂文罗军张飞
Owner CHONGQING UNIV
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