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SPP optical tweezers device based on chiral dependent lens excitation

An excitation light and lens technology, applied in the field of near-field optics, can solve the problems of difficult control, difficult to achieve stable capture, uneven force on metal micro-nano structures, and achieve the effect of stable capture and dynamic manipulation

Pending Publication Date: 2019-01-18
SHENZHEN UNIV
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Problems solved by technology

[0008] The technical problem to be solved in this application is to provide a chirality-dependent lens-excited SPP optical tweezers device, which aims to solve the problem that in the prior art, metal micro-nanostructures are subjected to uneven and difficult to control forces in laser optical tweezers, and it is difficult to achieve alignment. Stable capture of single particles in three dimensions

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  • SPP optical tweezers device based on chiral dependent lens excitation
  • SPP optical tweezers device based on chiral dependent lens excitation

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Embodiment Construction

[0039] In order to make the purpose, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0040] It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in ...

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Abstract

The invention provides a SPP optical tweezers device based on chiral dependent lens excitation. The SPP optical tweezers device comprises an excitation light unit and a surface plasmon excitation unit. The excitation light unit is used for generating the special light beams of the chiral dependent lens to be incident to the surface plasmon excitation unit. The surface plasmon excitation unit is used for exciting the convergent surface plasmon special light field on the contact surface between the metal film and the sample solution by the special light beams and dynamically controlling the micro-nano structures in the sample solution through the surface plasmon special light field, wherein the dynamic control includes capture and repulsion of the micro-nano structures in the sample solution.

Description

technical field [0001] The present application belongs to the technical field of near-field optics, and in particular relates to a method based on chiral-dependent lens excitation [0002] SPP optical tweezers setup. Background technique [0003] In recent years, due to the unique chemical and physical properties of metal nanoparticles, metal particles have shown very important application prospects in the fields of biochemistry, catalysis, and surface Raman scattering enhancement, which have gradually increased people's demand for manipulating metal particles. However, due to the high absorption and high scattering characteristics of metal particles, in traditional laser optical tweezers, metal particles (especially mesoscopic size metal particles on the order of 100 nm to several microns) are often pushed away by the scattering force of the focused spot and cannot Therefore, the stable capture and manipulation of metal particles is still an urgent problem to be solved. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21K1/00G21K1/02
CPCG21K1/00G21K1/025
Inventor 张聿全余家豪汪先友代艳萌付孔文闵长俊袁小聪
Owner SHENZHEN UNIV
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