Abstract
We investigated plasmonic optical trapping (POT) of thermoresponsive polymer microgels labelled with a fluorescent probe. Upon plasmon excitation, the trapped microgels formed characteristic micro-patterns. The trapping behavior is caused by coupling of four physical phenomena; the plasmon-enhanced optical force, thermal convection, thermophoresis, and volume phase transition of the microgels. We discuss a mechanism of the micro-pattern formation.
© 2017 Optical Society of Japan
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