Observation and simulation of optical diffraction pattern of a rotating microgear

L. Kelemen*, P. Ormos, Nikolaus Klaus Metzger, W. Sibbett, Kishan Dholakia

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The emerging field of micro fluidics is challenged with a desire to pump, move and mix minute amounts of fluid. Such micro devices are operated by means of light matter interaction, namely they can be driven through utilizing birefringence and the polarization of the light as well as the reflection and refraction of light. The latter one enables micro motors to be operated in a tangential setup where the rotors are on axis with an optical waveguide. This has the advantage that the complexity of driving such a device in a lab on a chip configuration is reduced by delivering the driving light by means of a waveguide or fiber optics.

In this publication we study a micro motor being driven by a fiber optically delivered light beam. We present experimentally and theoretically how light is getting diffracted when in interaction with the rotors of a turning micro motor. By utilizing the two photon signal from a fluorescein dye being excited by a pulsed femtosecond Laser which was used to drive the motor. Additionally the rotation rate is investigated in dependence of the light field parameters.

Original languageEnglish
Title of host publicationOptical Trapping and Optical Micromanipulation III
EditorsKishan Dholakia, Gabriel C Spalding
Number of pages8
ISBN (Print)0-8194-6405-8
Publication statusPublished - 2006
EventSPIE Optics + Photonics 2006 - San Diego, United States
Duration: 13 Aug 200617 Aug 2006

Publication series

NameProceedings of SPIE
ISSN (Print)1996-756X
ISSN (Electronic)0277-786X


ConferenceSPIE Optics + Photonics 2006
Country/TerritoryUnited States
CitySan Diego


  • micro motor
  • diffraction


Dive into the research topics of 'Observation and simulation of optical diffraction pattern of a rotating microgear'. Together they form a unique fingerprint.

Cite this