Ultralow power trapping and fluorescence detection of single particles on an optofluidic chip.

Ultralow power trapping and fluorescence detection of single particles on an optofluidic chip.
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DOI:
10.1039/b915750f
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发表时间:
2010-01-21
期刊:
影响因子:
6.1
通讯作者:
Schmidt H
Schmidt H
中科院分区:
工程技术1区
文献类型:
--
作者:
Kühn S;Phillips BS;Lunt EJ;Hawkins AR;Schmidt H

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The development of on-chip methods to manipulate particles is receiving rapidly increasing attention. All-optical traps offer numerous advantages, but are plagued by large required power levels on the order of hundreds of milliwatts and the inability to act exclusively on individual particles. Here, we demonstrate a fully integrated electro-optical trap for single particles with optical excitation power levels that are five orders of magnitude lower than in conventional optical force traps. The trap is based on spatio-temporal light modulation that is implemented using networks of antiresonant reflecting optical waveguides. We demonstrate the combination of on-chip trapping and fluorescence detection of single microorganisms by studying the photobleaching dynamics of stained DNA in E. coli bacteria. The favorable size scaling facilitates the trapping of single nanoparticles on integrated optofluidic chips.
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发表时间: 1970-01-01
影响因子: 8.6
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