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Method for controlling optical force which radial isotropic nanowire is subjected to

An anisotropic, nanowire technology, applied in the field of light manipulation, which can solve problems such as the study of optical power that does not involve anisotropic materials

Active Publication Date: 2016-12-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing theories and technologies only discuss isotropic particles, but do not involve the study of light forces on anisotropic materials

Method used

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  • Method for controlling optical force which radial isotropic nanowire is subjected to
  • Method for controlling optical force which radial isotropic nanowire is subjected to
  • Method for controlling optical force which radial isotropic nanowire is subjected to

Examples

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Embodiment 1

[0035] This embodiment provides a normal Rayleigh scattering, with ε r =ε t The nanowire with =5 is a comparative example, the nanowire with a radius of 100nm and a relative magnetic permeability of 1 is placed in a vacuum medium, and the wave vector k 1 =10 3 The plane wave excites the nanowire along the radial direction, and the acceleration of the particle at this time is measured, and then the wave vector k 1 =10 4 The plane wave excites the nanowire, the acceleration of the particle is measured at this time, and the acceleration change in this case is recorded. Mathematica software can also be used for numerical calculation, and the obtained data can be drawn with Origin software to intuitively summarize the law of light manipulation.

[0036] See attached figure 1 , it is the function relationship diagram between the acceleration of the isotropic nanowire and the wave vector provided by this embodiment, when the wave vector k 1 =10 3 (At this time Log...

Embodiment 2

[0041] In this example, an anisotropic nanowire under non-Rayleigh superscattering is taken as the research object, and the radius size r 0 is 100nm, the relative permeability is 1, and the permittivity satisfies (such as ε r =-5,ε t =-0.2) the nanowire is placed in a vacuum medium, the magnetic field is polarized along the axial direction, and the wave vector in the medium is k 1 The transverse magnetic wave is incident on the nanowire along the radial direction, when satisfying k 1 r 0 =10 -4 ~10 -3 Under the quasi-static approximation of , changing the wave vector k of the incident wave 1 ,

[0042] Press

[0043] a = F m = k 0 2 m Im [ α e + α m ] - k ...

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Abstract

The invention discloses a method for controlling optical force which a radial isotropic nanowire is subjected to. Researches show that optical force which the radial isotropic nanowire is subjected to meets the Rayleigh's law, but the optical force which the radial isotropic nanowire is subjected to has abnormal behaviors under the conditions of non-Rayleigh disappearance and non-Rayleigh divergence. According to the method, according to the full-wave electromagnetic scattering theory and Maxwell stress tensor integral method, by utilizing changes of incident wave vectors, the optical force which the radial isotropic nanowire is subjected to is controlled. The optical force which the radial isotropic nanowire is subjected to can be enhanced or weakened by adjusting nanowire isotropic parameters. The method for controlling the optical force which the radial isotropic nanowire is subjected to can be used for capturing nano particles, and is favorable for practical application of a radial isotropic nanowire material.

Description

technical field [0001] The invention relates to the technical field of light manipulation, in particular to a method for manipulating light force on radially anisotropic nanowires. Background technique [0002] Nearly three decades have revolutionized the scientific understanding of the interaction between light and matter. The interaction between light and particles can be simply divided into two aspects: first, the regulation of electromagnetic wave propagation is played by the regulation of the dielectric constant and permeability of the particle material. Second, photons have momentum and angular momentum, and the interaction between light and matter is accompanied by the exchange of momentum, which is manifested as the force exerted by light on objects. The force acting on the object is equal to the change of the momentum of the object per unit time caused by light, and the resulting change of the displacement and speed of the object is called the mechanical effect of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/09
CPCG02F1/09
Inventor 陈鸿莉卞秀高雷
Owner SUZHOU UNIV
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