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Photorefractive Optoelectronic Tweezers and Their Applications

  • Book
  • © 2015

Overview

Authors:
  1. Michael Esseling

    1. Inst. of Applied Physics, University of Münster, Münster, Germany

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  • Nominated as an outstanding Ph.D. thesis by Westfälische Wilhelms University of Münster, Germany
  • Details optofluidic applications of lithium niobate
  • Presents coloured 2D electric field and phase data maps
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (7 chapters)

  1. Front Matter

    Pages i-xi
    Download chapter PDF

  2. Introduction: Optically-Mediated Particle Manipulation with High Throughput

    • Michael Esseling
    Pages 1-6

  3. Electrokinetic Forces in Inhomogeneous Fields

    • Michael Esseling
    Pages 7-14

  4. Electric Fields and Their Detection in Photorefractive Crystals

    • Michael Esseling
    Pages 15-40

  5. Quantitative Investigation of Photorefractive Substrate Materials

    • Michael Esseling
    Pages 41-60

  6. Optically-Induced Dielectrophoretic Particle Trapping

    • Michael Esseling
    Pages 61-77

  7. Optofluidic Applications for Photorefractive Optoelectronic Tweezers

    • Michael Esseling
    Pages 79-103

  8. Summary

    • Michael Esseling
    Pages 105-109

  9. Back Matter

    Pages 111-125
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Keywords

About this book

In the never-ending quest for miniaturization, optically controlled particle trapping has opened up new possibilities for handling microscopic matter non-invasively. This thesis presents the application of photorefractive crystals as active substrate materials for optoelectronic tweezers. In these tweezers, flexible optical patterns are transformed into electrical forces by a photoconductive material, making it possible to handle matter with very high forces and high throughput. Potential substrate materials’ properties are investigated and ways to tune their figures-of-merit are demonstrated. A large part of the thesis is devoted to potential applications in the field of optofluidics, where photorefractive optoelectronic tweezers are used to trap, sort and guide droplets or particles in microfluidic channels, or to shape liquid polymers into optical elements prior to their solidification. Furthermore, a new surface discharge model is employed to discuss the experimental conditions needed for photorefractive optoelectronic tweezers.

Authors and Affiliations

  • Inst. of Applied Physics, University of Münster, Münster, Germany

    Michael Esseling

About the author

After receiving his diploma degree in Physics from the University of Münster for a project on microfluidics, Michael Esseling moved into the field of micro-particle manipulation and obtained his PhD in the group of Prof. Cornelia Denz in 2014 for his thesis "Photorefractive Optoelectronic Tweezers and Their Applications". His further research interests include the use photophoretic forces and accurately shaped light fields - so-called bottle beams - for handling absorbing matter on the microscale.

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