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

H.-W. Su; C.-Y. Lin; S.-J. Chen

doi:10.1117/12.930312

10 October 2012 Two-dimensional freeform optical trapping by surface plasmon enhancement and patterned excitation

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

Author Affiliations +

Proceedings Volume 8458, Optical Trapping and Optical Micromanipulation IX; 84583B (2012) https://doi.org/10.1117/12.930312
Event: SPIE NanoScience + Engineering, 2012, San Diego, California, United States

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.

Citation Download Citation

H.-W. Su, C.-Y. Lin, and S.-J. Chen "Two-dimensional freeform optical trapping by surface plasmon enhancement and patterned excitation", Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84583B (10 October 2012); https://doi.org/10.1117/12.930312

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