Outline
Sponsored Links
This presentation is the property of its rightful owner.
1 / 9

Outline PowerPoint PPT Presentation


  • 88 Views
  • Uploaded on
  • Presentation posted in: General

Outline. Introduction Main Principles Computational Model and Results Experimental Preliminary Results Conclusions and Future Work. What are optical tweezers? . Motivation Manipulation : Cell/particle manipulation withouth physical contact;

Download Presentation

Outline

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Outline

  • Introduction

  • Main Principles

  • Computational Model and Results

  • Experimental Preliminary Results

  • Conclusions and Future Work

Young Scientist's 1st International Baku Forum


What are optical tweezers?

  • Motivation

  • Manipulation: Cell/particle manipulation withouth physical contact;

  • Miniaturization: Diagnostic devices (in vivo cells, ...)

  • Main Goals

  • Development of fiber optical tweezers;

  • Study of the forces:

    • Numerical models;

    • Design and optimization of fiber structures;

  • Fabrication of devices;

  • Field of application: Manipulation of Red Blood Cells.

Liu, Z. et al Opt. Express, OSA, 2006, 14, 12510-12516

Young Scientist's 1st International Baku Forum


Main Principles

  • Particle placed in the focusing region of a laser beam:

  • Force  transference of momentum on the particle surface (reflections/refractions).

  • Scatering Force

  • Gradient Force

Ashkin, A., Dziedzic, J. M., Bjorkholm, J.E. and Chu, S. (1986),Opt Lett., 11, 288-290;

Ashkin, A. (1970),Phys. Rev. Lett., 24, 156-159.

Young Scientist's 1st International Baku Forum


Computational model and Results

Lorentz Force (dipoles):

R. S. RODRIGUES RIBEIROet al, “ComputationalModelsfor New FiberOpticTweezers”, PhotonicSensors

Young Scientist's 1st International Baku Forum


Results

Young Scientist's 1st International Baku Forum


Preliminary Results

Experimental Preliminary Results

  • Lens – polimer:

    • radius ~ 30-40 μm;

  • Laser Diode 980 nm, P = 100mW;

  • Polystyrene particles:

R. S. Rodrigues Ribeiro, et al., New theoretical and experimental methods for the design of fiber optic tweezers, EWOFS, Poland,2013

Young Scientist's 1st International Baku Forum


Conclusion and Future Work

  • Development of a 2D numerical model to calculate optical forces acting on a particle/cell;

  • Fabrication of lenses in optical fibers;

  • Implementation of a 3D numerical model;

  • Study of distinct fiber geometries;

  • Manipulation of RBC.

Young Scientist's 1st International Baku Forum


Thanks!

Young Scientist's 1st International Baku Forum


  • Login