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Proceedings Paper

2D freeform plasmonic trapping via spatial light modulator
Author(s): H.-W. Su; C.-Y. Lin; K.-C. Chiu; H.-L. Tsai; S.-J. Chen
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Paper 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.

Paper Details

Date Published: 10 February 2011
PDF: 7 pages
Proc. SPIE 7902, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX, 79020O (10 February 2011); doi: 10.1117/12.877134
Show Author Affiliations
H.-W. Su, National Cheng Kung Univ. (Taiwan)
C.-Y. Lin, National Cheng Kung Univ. (Taiwan)
K.-C. Chiu, National Cheng Kung Univ. (Taiwan)
H.-L. Tsai, Missouri Univ. of Science and Technology (United States)
S.-J. Chen, National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7902:
Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues IX
Daniel L. Farkas; Dan V. Nicolau; Robert C. Leif, Editor(s)

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