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Proceedings Article

2D freeform plasmonic trapping via spatial light modulator

[+] Author Affiliations
H.-W. Su, C.-Y. Lin, K.-C. Chiu, S.-J. Chen

National Cheng Kung Univ. (Taiwan)

H.-L. Tsai

Missouri Univ. of Science and Technology (USA)

Proc. SPIE 7902, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX, 79020O (February 10, 2011); doi:10.1117/12.877134
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From Conference Volume 7902

  • Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX
  • Daniel L. Farkas; Dan V. Nicolau; Robert C. Leif
  • San Francisco, California, USA | January 22, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

H.-W. Su ; C.-Y. Lin ; K.-C. Chiu ; H.-L. Tsai and S.-J. Chen
"2D freeform plasmonic trapping via spatial light modulator", Proc. SPIE 7902, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX, 79020O (February 10, 2011); doi:10.1117/12.877134; http://dx.doi.org/10.1117/12.877134


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