期刊
JOURNAL OF NANOPHOTONICS
卷 2, 期 -, 页码 -出版社
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.2992045
关键词
optical trapping and manipulation; optical tweezers; nanoparticles; particle plasmons; Rayleigh and Mie scattering; optical Lorentz force
资金
- Royal Society Wolfson Research Merit Award Holder
- Stiftung der Deutschen Wirtschaft
- sdw (Foundation of German Business)
- SPIE
- UK Engineering and Physical Sciences Research Council
Optical trapping is an established field for movement of micron-size objects and cells. However, trapping of metal nanoparticles, nanowires, nanorods and molecules has received little attention. Nanoparticles are more challenging to optically trap and they offer ample new phenomena to explore, for example the plasmon resonance. Resonance and size effects have an impact upon trapping forces that causes nanoparticle trapping to differ from micromanipulation of larger micron-sized objects. There are numerous theoretical approaches to calculate optical forces exerted on trapped nanoparticles. Their combination and comparison gives the reader deeper understanding of the physical processes in an optical trap. A close look into the key experiments to date demonstrates the feasibility of trapping and provides a grasp of the enormous possibilities that remain to be explored. When constructing a single-beam optical trap, particular emphasis has to be placed on the choice of imaging for the trapping and confinement of nanoparticles.
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