Programmable waveguide based on adjustable metamaterial

A metamaterial and waveguide technology, applied in the field of integrated optics, can solve problems such as large insertion loss of waveguides, complex equipment manufacturing, and strength attenuation, and achieve the effects of increasing propagation distance, avoiding access loss, and increasing the difference in refractive index

Pending Publication Date: 2020-11-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, waveguides in traditional silicon photonics suffer from large insertion loss
Although tunable waveguide devices made of liquid crystals have recently appeared, they still have problems such as complex equipment manufacturing, high cost, and serious intensity attenuation during propagation.

Method used

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  • Programmable waveguide based on adjustable metamaterial
  • Programmable waveguide based on adjustable metamaterial
  • Programmable waveguide based on adjustable metamaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: see figure 1 , a waveguide based on metamaterials, consisting of a metamaterial layer 3 wrapped by a liquid crystal 4 and upper and lower substrates 1, 2. The lowest layer is the lower substrate, which can be made of total reflection metal and other materials. The spherical superatoms are evenly distributed on the lower substrate at a fixed distance, and the superatoms are made of dielectric materials. The uppermost layer of the substrate can be made of materials such as total reflection metal, and the liquid crystal is filled between the upper and lower substrates and wraps the superatoms.

[0028] A waveguide works as follows. Such as figure 2 As shown, the waveguide is divided into a core region and a cladding region. Through the liquid crystal alignment technology, the liquid crystals in the core layer and the cladding area are set to have a specific director distribution, that is, the director distributions of the liquid crystal molecules in the c...

Embodiment 2

[0031] Embodiment 2: as figure 1 As shown, a tunable active waveguide based on metamaterial, the waveguide is composed of a metamaterial layer wrapped by liquid crystal and upper and lower substrates. Spherical superatoms with the same size are evenly distributed on the lower substrate at a fixed distance, and the superatoms are made of dielectric materials. The upper substrate is made of total reflection metal material, and the liquid crystal is filled between the upper and lower substrates and wraps the superatoms.

[0032] The lower substrate is a silicon-based pixelated control circuit, and each pixel controls the liquid crystal above it. After receiving the control signal, the circuit can make each pixel generate a driving electric field in the liquid crystal layer above it, and the driving electric field can control the director of the liquid crystal molecules in the pixel. Among them, the control mode of the liquid crystal adopts the FFS control mode. The initial dir...

Embodiment 3

[0036] Embodiment 3: as figure 1 As shown, a tunable active waveguide based on metamaterial, the waveguide is composed of a metamaterial layer wrapped by liquid crystal and upper and lower substrates. Spherical superatoms with the same size are evenly distributed on the lower substrate at a fixed distance, and the superatoms are made of dielectric materials. The upper substrate is made of total reflection metal material, and the liquid crystal is filled between the upper and lower substrates and wraps the superatoms.

[0037] The lower substrate is a silicon-based pixelated control circuit, and each pixel controls the liquid crystal above it. After receiving the control signal, the circuit can make each pixel generate a driving electric field in the liquid crystal layer above it, and the driving electric field can control the director of the liquid crystal molecules in the pixel. Among them, the control mode of liquid crystal adopts VA control mode. The initial director dis...

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Abstract

The invention relates to a programmable waveguide based on an adjustable metamaterial. The waveguide comprises an upper substrate, a lower substrate, a metamaterial layer and a liquid crystal. The metamaterial layer is located on the lower substrate and is composed of superatoms distributed on the lower substrate. The liquid crystal fills the gap between the upper substrate and the lower substrateand wraps the superatoms. The liquid crystal is regulated and controlled by programming an external driver, so that Mie resonance of light in the metamaterial is changed, finally equivalent refractive index distribution is changed, and switching of waveguide functions is achieved. Compared with a traditional programmable waveguide, the programmable waveguide has the advantages that a new thoughtis provided in the aspect of working principle, higher transmission efficiency and energy utilization rate are achieved in the aspect of transmission performance, and higher programming freedom degreeand wider application direction are achieved.

Description

technical field [0001] The invention relates to a programmable waveguide, in particular to a programmable waveguide based on an adjustable metamaterial, and belongs to the technical field of integrated optics. Background technique [0002] In the field of integrated optics, waveguides are the key to connect various functional components, which guide the propagation of light through total internal reflection achieved by the difference in refractive index between different layers. Introducing programmable features into integrated optics can improve system safety and robustness. At present, programmable functions in integrated optical circuits are mainly realized by introducing switchable waveguides in traditional passive integrated optical circuits. [0003] However, waveguides in conventional silicon photonics suffer from large insertion losses. Although tunable waveguide devices made of liquid crystals have appeared recently, they still have problems such as complicated de...

Claims

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Application Information

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IPC IPC(8): G02F1/13G02F1/133G02F1/1337G02B1/00
CPCG02F1/13306G02F1/1337G02F1/1326G02B1/002
Inventor 杨可扬夏军
Owner SOUTHEAST UNIV
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