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Proceedings Paper

Plasmon assisted optical trapping: fundamentals and biomedical applications
Author(s): Alexandros A. Serafetinides; Mersini Makropoulou; Georgios N. Tsigaridas; Anastasios Gousetis
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Paper Abstract

The field of optical trapping has dramatically grown due to implementation in various arenas including physics, biology, medicine and nanotechnology. Certainly, optical tweezers are an invaluable tool to manipulate a variation of particles, such as small dielectric spheres, cells, bacteria, chromosomes and even genes, by highly focused laser beams through microscope. As the main disadvantage of the conventional optical trapping systems is the diffraction limit of the incident light, plasmon assisted nanotrapping is reported as a suitable technique for trapping sub-wavelength metallic or dielectric particles. In this work, firstly, we report briefly on the basic theory of plasmon excitation, focusing on the interaction of nanoscale metallic structures with laser light. Secondly, experimental and numerical simulation results are also presented, demonstrating enhancement of the trapping efficiency of glass or SiO2 substrates, coated with Au and Ag nanostructures, with or without nanoparticles. The optical forces were calculated by measuring the particle’s escape velocity calibration method. Finally, representative applications of plasmon assisted optical trapping are reviewed, from cancer therapeutics to fundamental biology and cell nanosurgery.

Paper Details

Date Published: 8 January 2015
PDF: 14 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94470V (8 January 2015); doi: 10.1117/12.2178248
Show Author Affiliations
Alexandros A. Serafetinides, National Technical Univ. of Athens (Greece)
Mersini Makropoulou, National Technical Univ. of Athens (Greece)
Georgios N. Tsigaridas, National Technical Univ. of Athens (Greece)
Anastasios Gousetis, National Technical Univ. of Athens (Greece)

Published in SPIE Proceedings Vol. 9447:
18th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Alexandros Serafetinides, Editor(s)

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