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Method for preparing metasurface by laser-induced nanosphere aggregation and arrangement

A laser-induced, nano-sphere technology, applied in the field of laser applications, can solve the problems of high cost and high precision requirements, and achieve the effect of reducing processing costs

Active Publication Date: 2021-12-10
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing metasurface manufacturing, such as photolithography, adopts a "top-down" processing method, which requires extremely high precision of mask plates and other equipment, and the cost is high

Method used

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  • Method for preparing metasurface by laser-induced nanosphere aggregation and arrangement
  • Method for preparing metasurface by laser-induced nanosphere aggregation and arrangement
  • Method for preparing metasurface by laser-induced nanosphere aggregation and arrangement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a method for preparing a metasurface by laser-induced aggregation and arrangement of nanospheres, the experimental system used specifically includes:

[0028] Continuous solid-state laser-1, spatial filter-2, first convex lens-3, aperture stop-4, first polarizer-5, spatial light modulator-6, second polarizer-7, second convex lens- 8. The third convex lens-9, beam splitter-10, microscope objective-11, optical filter-12, LED light source-13, CMOS camera-14, sample chamber-15, computer-16, including: continuous solid-state laser -1 emits a laser light source, after beam expansion by the spatial filter-2 and collimation by the first convex lens-3, stray light is eliminated by the aperture stop-4, the first polarizer-5 is a polarizer, and the spatial light modulator- 6 is used to generate the target structured light field, including two types of transmission and reflection, the second polarizer-7 is an analyzer, the focal lengths of convex lens-8 ...

Embodiment 2

[0039] Other steps are all the same as in Example 1, except that the first polarizer-5, the spatial light modulator-6 and the second polarizer-7 in the experimental system are removed, and the Fresnel diffraction produced by the aperture stop Directly as the target structured light field, incident into the sample chamber.

[0040] Such as image 3 As shown, it is a Fresnel zone plate-like metasurface structure obtained by using an aperture stop to generate a Fresnel diffraction light field and arranging nanospheres according to the embodiment of the present invention.

[0041] Such as Figure 4 Shown is a Fresnel zone plate-like metasurface structure obtained by the method of the present invention, which is applied to the functional display of micro-scale light amplification and focusing effects.

[0042] Such as Figure 5 Shown is a Fresnel zone plate-like metasurface structure obtained by the method of the present invention, the intensity distribution diagram of the trans...

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Abstract

The invention relates to a method for preparing a metasurface through laser-induced nanosphere aggregation and arrangement, and belongs to the technical field of laser application. On the basis of a laser-induced self-assembly technology, a continuous laser is used as an excitation light source, and a target structure light field is generated under the action of a spatial light modulator, a diaphragm, a spiral phase plate or an axicon array; molybdenum diselenide nanospheres are effectively and controllably gathered and arranged in an ethanol solution due to a photothermal effect and an optical trap effect according to the intensity distribution of an incident light field, so that the metasurface is formed. Compared with a traditional metasurface manufacturing method, the bottom-to-top machining method has the advantages that the machining cost is reduced, large-scale, integrated and functional application can be achieved, and the method is expected to be applied to machining and manufacturing of novel micro-nano optical structures and micro-nano optical devices.

Description

technical field [0001] The invention relates to the technical field of laser applications, in particular to a method for preparing a metasurface by aggregating and arranging laser-induced nanospheres. Background technique [0002] Metamaterials and metasurfaces are expected to become one of the future development directions of advanced micro-nano devices. Using laser-induced self-assembly technology to promote the vigorous development of semiconductor processing, additive manufacturing, lithography and other advanced fields is of great significance and research value. [0003] Existing optical tweezers such as holographic optical tweezers and scanning optical tweezers are mainly used to manipulate polystyrene beads, silicon beads, metal beads, etc., and apply light pressure and generate photodynamic force to the beads through a structured light field. However, However, the optical tweezers technology is mainly used to capture and move single or several particles, and cannot...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B5/18
CPCG02B1/002G02B5/1876
Inventor 匡登峰刘刚铄
Owner NANKAI UNIV
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