A metamaterial and method for realizing similar electromagnetically induced transparency effect

An electromagnetically induced transparent and realization-like technology, which can be used in instruments, optics, optical components, etc., can solve the problems of narrow transmission window bandwidth, inconvenient application, and limited application scope of EIT-like, and achieve the effect of broad application prospects.

Active Publication Date: 2021-12-10
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0003] Although people have done a lot of research on EIT-like metamaterials, the inventors found in the research that the defect of the prior art is that the transmission window bandwidth of these EIT-like metamaterials is relatively narrow, which seriously limits the application range of EIT-like metamaterials. And the existing technology can only solve the problem of narrow bandwidth by adjusting the geometric size of the metamaterial structure, which is very inconvenient for the practical application of metamaterials with fixed structures

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  • A metamaterial and method for realizing similar electromagnetically induced transparency effect
  • A metamaterial and method for realizing similar electromagnetically induced transparency effect
  • A metamaterial and method for realizing similar electromagnetically induced transparency effect

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Embodiment Construction

[0030] The present invention proposes a metamaterial that realizes an electromagnetically induced transparency effect, specifically a mixed metal graphene metamaterial, which is used to widen the EIT-like transmission window under the terahertz spectrum. Compared with previous metamaterials, this metamaterial has superior performance in the widest and tunable bandwidth range. This metamaterial provides a new way to actively control the EIT transmission window, and has broad application prospects in broadband slow-light devices, filters, and modulators in terahertz communications.

[0031] figure 1 (a) A three-dimensional schematic diagram showing a metamaterial that achieves an electromagnetically induced transparency effect. His subunit structure consists of a parallel cut wire pair (PCWP) as a dark mode resonator and a vertical cut wire pair (VCWP) as a bright mode resonator. Metal aluminum is used as the material of the bright and dark mode resonator. Two graphene ribbon...

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Abstract

The invention relates to a metamaterial and a method for realizing a similar electromagnetically induced transparency effect, a substrate and a periodic structural subunit on the substrate, and the structural subunit includes a pair of parallel cutting lines as a dark mode resonator and a pair of vertical cut lines as a bright film resonator, the pair of parallel cut lines and the pair of vertical cut lines are made of metallic materials; two graphene strips of different widths are arranged between the structural subunit and the substrate , one graphene ribbon is placed under the bright-film resonator to widen the transmission window, and the other graphene ribbon is used to connect all the bright-film resonators. The invention has wide application prospect.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a metamaterial and a method for realizing an electromagnetically induced transparency effect. Background technique [0002] Electromagnetically induced transparency (EIT) describes an experimental phenomenon of sharp transmission windows produced in broad absorption curves, which is accompanied by changes in the dispersion properties of light and thus has many potential applications such as slow light, biochemical Sensing, filtering, etc. This phenomenon, first discovered in experiments with three-level atomic systems, is caused by quantum destructive interference between two different excitation paths. However, the application of EIT is greatly limited because the experiment of atomic system requires extremely harsh conditions, such as optical pumping and extremely low temperature. Recently, an analogue of electromagnetically induced transparency (EIT-like) has been pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00G02F1/00G02F1/01
CPCG02B1/002G02F1/0009G02F1/0102G02F1/0121
Inventor 韦中超孙昊瀛许宁
Owner SOUTH CHINA NORMAL UNIVERSITY
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