Trapping particles using waveguide-coupled gold bowtie plasmonic tweezers

Pin Tso Lin, Heng Yi Chu, Tsan Wen Lu, Po Tsung Lee*

*Corresponding author for this work

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

We propose and demonstrate a trapping configuration integrating coupled waveguides and gold bowtie structures to form near-field plasmonic tweezers. Compared with excitation from the top, waves coupled through the waveguide can excite specific bowties on the waveguide and trap particles precisely. Thus this scheme is more efficient and compact, and will assist the circuit design on a chip. With lightning rod and gap effects, the gold bowtie structures can generate highly concentrated resonant fields and induce trapping forces as strong as 652 pN W -1 on particles with diameters as small as 20 nm. This trapping capability is investigated numerically and verified experimentally with observations of the transport, trapping, and release of particles in the system.

原文English
頁(從 - 到)4647-4652
頁數6
期刊Lab on a Chip
14
發行號24
DOIs
出版狀態Published - 21 十二月 2014

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