High-performance circular polarization dichromatic device and method with enhanced chirality optical response in surface

A surface enhancement, optical response technology, applied in the field of nano-optics, can solve the problems of high environmental protection, high production cost, difficult technology, etc., and achieves low cost, adjustable response band, huge circular dichroic optical activity. Effect

Inactive Publication Date: 2019-09-20
NANKAI UNIV
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Problems solved by technology

For example, various metal micro-nano structures produced by electron beam etching or ion beam etching have the properties of uniformity, repeatability, fine control of structural parameters, and ultra-sensitivity, but their production costs are very high and difficult to fabricate. For large-area chiral micro-nano structures on the order of centimeters or even millimeters, the raw materials and technologies used cannot be highly environmentally friendly, so this technology is difficult to use in practical applications

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  • High-performance circular polarization dichromatic device and method with enhanced chirality optical response in surface
  • High-performance circular polarization dichromatic device and method with enhanced chirality optical response in surface
  • High-performance circular polarization dichromatic device and method with enhanced chirality optical response in surface

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Embodiment Construction

[0037] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0038] like figure 1As shown, the preparation method of the high-performance surface-enhanced chiral optical response circular polarization dichroic device of this embodiment includes the following steps:

[0039] 1) Design the parameters of the metal crescent array, including period, shape and thickness of the crescent structure;

[0040] 2) Provide a clean 15×15×1 (mm) quartz plate as the substrate;

[0041] 3) Using polystyrene PS as the mask microspheres, forming a single-layer close-packed array through self-assembly, and then transferring the mask microspheres to the substrate;

[0042] 4) The processing chamber of the ion beam etching machine is pre-dropped with heat-conducting silicone oil, and the mask microspheres on the substrate are placed in the processing chamber. The direction of the sputtered particles is consistent with ...

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Abstract

The invention discloses a high-performance circular polarization dichromatic device and method with enhanced chirality optical response in the surface. Ion beams sputters precious metal in the surface with an inclination angle of a substrate, a precious metal film is sputtered in part of a projection area vertical to the surface of the substrate of mask microspheres, the mask microspheres as a reticle etches area not covered by the mask microspheres of the precious metal film, the precious metal film exposed between adjusted mask microphones is etched, precious metal in the projection area vertical to the substrate surface of the mask microspheres is reserved, and the mask microspheres are removed to obtain a metal crescent array formed on the substrate. The period controllable metal crescent array has the advantages of large area, low cost, high circular dichromatic optical activity, tunable response waveband, uniform and environment protective, and can satisfy needs for theoretical research and practical application; and thus, a strong tool and solid basis are provided for theoretical research and practical application of chirality optics.

Description

technical field [0001] The invention relates to the field of nano optics, in particular to a high-performance surface-enhanced chiral optical response circular polarization dichroic device and a preparation method thereof. Background technique [0002] Chirality is a fascinating phenomenon in nature. The concept was originally proposed because the chiral molecule itself and its mirror image (also known as the enantiomer) cannot overlap through rotation or translation, so that such substances exhibit some unique properties. It has been widely studied in the fields of life science, organic chemistry, polymer materials, physics and so on. At the same time, when using chiral signals to detect food, biology, medicine and other fields, the operation is pollution-free, fast and simple. It provides reliable technical support for further improving food and drug safety. In recent years, studies have shown that plasmonic metal nanoparticles can effectively enhance chiral signals thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/10C23C14/58C23C14/46C23C14/18C23C14/04C23C14/02
CPCC23C14/022C23C14/042C23C14/185C23C14/46C23C14/5873G02B1/10G02B5/30
Inventor 齐继伟曹力元孙骞吴强陈靖陈宗强许京军
Owner NANKAI UNIV
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