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Substrate for enhancing magneto-optical effect by applying silicon micro-nano structure

A technology of micro-nano structure and structural enhancement, applied in optics, optical components, nonlinear optics, etc., can solve the problems of weak surface plasmon effect and weak magneto-optic effect, achieve good application value, improve strength, enhance The effect of the magneto-optical effect

Inactive Publication Date: 2020-10-30
中山科立特光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface plasmons generated by the metal micro-nano structure have weak interaction with magnetic materials, and the magneto-optical effect is weak.

Method used

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  • Substrate for enhancing magneto-optical effect by applying silicon micro-nano structure
  • Substrate for enhancing magneto-optical effect by applying silicon micro-nano structure

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Effect test

Embodiment 1

[0020] The invention provides a substrate for enhancing the magneto-optical effect by applying silicon microstructure. Such as figure 1 As shown, the substrate includes a base 1 and microstructure units 2 arranged periodically. The material of the base 1 is non-magnetic material. Preferably, the material of the substrate 1 is silicon dioxide. The microstructure unit 2 is in the shape of a one-dimensional wire grid. The microstructure units 2 are placed on the substrate 1 periodically. That is to say, the microstructure units 2 are a one-dimensional array. The microstructure unit 2 includes a first micro-nano structure part 3, a second micro-nano structure part 4, and a magnetic material part 5, and the first micro-nano structure part 3, the second micro-nano structure part 4, and the magnetic material part 5 are all placed on the substrate 1 on. That is to say, the first micro-nano structure part 3 , the second micro-nano structure part 4 and the magnetic material part 5...

Embodiment 2

[0026] On the basis of Example 1, the height of the first micro-nano structure part 3 and the second micro-nano structure part 4 is greater than 400 nanometers, and the distance between the first micro-nano structure part 3 and the second micro-nano structure part 4 is less than 50 nm. Nano. Furthermore, the height of the first micro-nano structure part 3 and the second micro-nano structure part 4 is greater than 500 nanometers, and the distance between the first micro-nano structure part 3 and the second micro-nano structure part 4 is less than 40 nanometers. In this way, a gap is formed between the first micro-nano structure part 3 and the second micro-nano structure part 4 . Under the action of excitation light, a strong electric field in the same direction is gathered in the gap, and the strong electric field has a stronger interaction with the magnetic material, thereby increasing the intensity of the magneto-optic effect.

Embodiment 3

[0028] On the basis of embodiment 2, a thin film layer 6 is also included, and the thin film layer 6 is placed between the substrate 1 and the microstructure unit 2 . The material of the film layer 6 is noble metal. In this way, the film layer 6 reflects the electric field between the first micro-nano structure part 3 and the second micro-nano structure part 4, forming a stronger electric field concentration in the gap, further enhancing the interaction between the local electric field and the magnetic material, Enhance the magneto-optical effect.

[0029] Furthermore, a groove is provided on the top of the film layer 6 under the gap formed by the first micro-nano structure part 3 and the second micro-nano structure part 4 . The shape of the cross-section of the groove can be wedge-shaped, square or semi-circular. On the one hand, the grooves can be filled with magnetic materials, so that more magnetic materials can produce magneto-optic effects; on the other hand, under the...

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Abstract

The invention provides a substrate for enhancing a magneto-optical effect by applying a silicon microstructure, which comprises a base and periodically arranged microstructure units, wherein the microstructure unit is in a one-dimensional wire grid shape, the microstructure units are periodically arranged on the base, the microstructure unit comprises a first micro-nano structure part, a second micro-nano structure part and a magnetic material part, the magnetic material part is arranged between the first micro-nano structure part and the second micro-nano structure part, and the first micro-nano structure part and the second micro-nano structure part are made of silicon. During application, incident light obliquely irradiates the microstructure units, electric fields in the same directionare excited between the first micro-nano structure part and the second micro-nano structure part of the silicon material, and magnetic fields are excited in the first micro-nano structure part and the second micro-nano structure part, so that the magnetic moment in the magnetic material is changed, the intensity of the magneto-optical effect is further improved, and the substrate has a good application value in the aspect of magneto-optical effect application.

Description

technical field [0001] The invention relates to the application field of magneto-optic effect, in particular to a substrate for enhancing magneto-optic effect with silicon micro-nano structure. Background technique [0002] The magneto-optic effect is the effect that links light and magnetism. The magneto-optical effect refers to the phenomenon that the polarization of electromagnetic waves changes when incident light enters a material with an inherent magnetic moment and is transmitted or reflected at a material interface. The magneto-optic effect has important applications in magneto-optic isolation, optical switches, magneto-optic information storage, and biological detection. In recent years, studies have found that surface plasmons generated by metal micro-nano structures can enhance the magneto-optic effect. However, the surface plasmons generated by the metal micro-nano structure have weak interaction with magnetic materials, and the magneto-optic effect is weak. ...

Claims

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Application Information

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IPC IPC(8): G02F1/09G02B5/00
CPCG02B5/008G02F1/09G02F1/092
Inventor 不公告发明人
Owner 中山科立特光电科技有限公司
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