Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Device and method for manipulating particles to perform asymmetric spin and orbital motion

An orbital movement and asymmetric technology, applied in the field of optical micro-manipulation, can solve the problems of few researches on optical capture and manipulation, and achieve the effects of low manufacturing cost, strong stability and mature technology

Active Publication Date: 2018-08-17
SOUTHEAST UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the optical trapping and manipulation of vector light fields with broken polarization distribution symmetry.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for manipulating particles to perform asymmetric spin and orbital motion
  • Device and method for manipulating particles to perform asymmetric spin and orbital motion
  • Device and method for manipulating particles to perform asymmetric spin and orbital motion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] If a Gaussian linearly polarized laser beam with a wavelength of 532nm is used, the incident light is loaded with a power index phase through the vector light field generating device (3) information, so as to generate the local linear polarization vector light field with power exponent n=2, the light field expression is:

[0030]

[0031] E. 0 is the amplitude constant, ω is the radius of the incident beam, (ρ, φ) is the radial and angular coordinates in the polar coordinate system, and are unit vectors in the Cartesian coordinate system (x, y), respectively. In water (refractive index 1.33), it is tightly focused with an objective lens with a numerical aperture of 1.26 to obtain a focal field with a specific distribution of intensity and polarization state. When the focal field interacts with Rayleigh medium particles (with a radius of 30nm and a refractive index of 1.6), since the linear momentum and angular momentum of the focal field itself are transferred ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a device and method for manipulating particles to perform asymmetric spin and orbital motion. The method comprises the steps that a bundle of linearly polarized Gaussian laser beams are sequentially combined by a set of lenses and then is collimated and expanded, then a vector light field generating device is used to generate a vector light field of the angular change of a power exponent, then through a high numerical aperture object lens, in a focal plane, the linear momentum and angular momentum of the light field are changed, in the interaction with Rayleighmedium particles, and when the linear momentum and angular momentum are transferred to captured particles, the asymmetric spin and orbital motion of the particles are achieved. The device and method have the advantages of a simple light path, a simple device structure, mature technology and strong stability.

Description

Technical field: [0001] The invention relates to the manipulation of Rayleigh particles by a tightly focused vector light field, and belongs to the field of optical micro-manipulation. Specifically, it is a device that utilizes a tightly focused vector light field to realize asymmetric spin and orbital motion of micro-nano particles and methods. Background technique: [0002] As the main properties of electromagnetic waves, linear momentum and angular momentum play an important role in the interaction process of light and matter. The linear momentum of light includes spin and orbital parts: the spin linear momentum is proportional to the curl of the spin density of the light field, and the orbital linear momentum is proportional to the radiation force acting on the Rayleigh particle. Similarly, the optical angular momentum of electromagnetic waves can also be divided into two parts: spin and orbit: the spin angular momentum comes from the polarization of light, causing the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 顾兵张迎娣刘天宇芮光浩崔一平
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com