Noise induced transport at microscale enabled by optical fields

Shreyas Bhaban, Saurav Talukdar, Murti Salapaka

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

4 Scopus citations


Transport at the micro scale is an essential aspect for many emerging areas including manufacturing systems at the nanoscale. Transfer of beads decorated with cargo under the influence of optical fields provide an attractive means of such transport. Physical models that describe beads in optical fields under the influence of thermal noise are available which yield a qualitative understanding of the bead motion; however, it is difficult to arrive at models that provide quantitative agreement. The first contribution of the article is the determination of a model of a bead under a static field realized by optical forces where the model can be used to predict the motion of the bead under a time-varying optical potential with high fidelity. Close agreement between model based Monte Carlo simulations and experimental observations is seen. The other contribution is a strategy for directed transport of micron-sized particles that utilizes the proposed models to arrive at conclusions which are experimentally verified and easy to implement. The effectiveness of this transport mechanism is justified based on splitting probability computations. Applications to transport of cargo across multiple locations and transport of multiple cargo are experimentally demonstrated.

Original languageEnglish (US)
Title of host publication2016 American Control Conference, ACC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Electronic)9781467386821
StatePublished - Jul 28 2016
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: Jul 6 2016Jul 8 2016

Publication series

NameProceedings of the American Control Conference
ISSN (Print)0743-1619


Other2016 American Control Conference, ACC 2016
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2016 American Automatic Control Council (AACC).


  • Double well potential
  • Harmonic potential
  • Langevian equation
  • Nano scale transport
  • Optical trap
  • Thermal noise induced transport


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