Two-dimensional freeform optical trapping by surface plasmon enhancement and patterned excitation

H. W. Su*, C. Y. Lin, S. J. Chen

*Corresponding author for this work

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

Abstract

In this study, a two-dimensional (2D) freeform optical trapping system based on evanescent wave excitation has been developed. The 2D optical trapping system with surface plasmon (SP) enhancement and patterned excitation via digital micromirror device (DMD) which can provide a strong and freeform intensity distribution on the metal surface. Through a gold film with a thickness of 45 nm in the near infrared region, the SP approach with 40-fold electric field enhancement can enhance the intensity distribution on the metal surface. Unlike a fixed gold pattern film fabricated at a glass surface, the freeform SP-enhanced optical trapping technique is more convenient and efficient for biomedical applications.

Original languageEnglish
Title of host publicationOptical Trapping and Optical Micromanipulation IX
DOIs
StatePublished - 1 Dec 2012
EventOptical Trapping and Optical Micromanipulation IX - San Diego, CA, United States
Duration: 12 Aug 201216 Aug 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8458
ISSN (Print)0277-786X

Conference

ConferenceOptical Trapping and Optical Micromanipulation IX
CountryUnited States
CitySan Diego, CA
Period12/08/1216/08/12

Keywords

  • Digital micromirror device
  • Optical trapping
  • Patterned excitation
  • Surface plasmon

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  • Cite this

    Su, H. W., Lin, C. Y., & Chen, S. J. (2012). Two-dimensional freeform optical trapping by surface plasmon enhancement and patterned excitation. In Optical Trapping and Optical Micromanipulation IX [84583B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8458). https://doi.org/10.1117/12.930312