2D freeform plasmonic trapping via spatial light modulator

H. W. Su*, C. Y. Lin, K. C. Chiu, H. L. Tsai, S. J. Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this study, an objective-based two-dimensional (2D) surface plasmon (SP)-enhanced optical trapping system with a spatial light modulator (SLM) has been developed to trap dielectric particles in freeform pattern. Through a gold film with a thickness of 45 nm in the near infrared region, a 40-fold electric field enhancement is reached and hence a strong 2D trapping force distribution with SP excitation has been demonstrated. Furthermore, the algorithm called weighted Gerchberg-Saxton can provide a freeform pattern which is used to control the trapping force distributions in the image space based on SLM. Unlike the patterns formed by finite gold areas fabricated on a glass surface, the freeform plasmonic trapping is a more convenient and efficient method to manipulate nanoparticles and biomolecules arbitrarily.

Original languageEnglish
Title of host publicationImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX
DOIs
StatePublished - 20 Apr 2011
EventImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX - San Francisco, CA, United States
Duration: 22 Jan 201125 Jan 2011

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7902
ISSN (Print)1605-7422

Conference

ConferenceImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX
CountryUnited States
CitySan Francisco, CA
Period22/01/1125/01/11

Keywords

  • optical trapping
  • spatial light modulator
  • surface plasmon
  • total internal reflection

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