A reconfigurable plasmofluidic lens

Chenglong Zhao, Yongmin Liu, Yanhui Zhao, Nicholas Fang and Tony Jun Huang ()
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Chenglong Zhao: The Pennsylvania State University
Yongmin Liu: Northeastern University
Yanhui Zhao: The Pennsylvania State University
Nicholas Fang: Massachusetts Institute of Technology
Tony Jun Huang: The Pennsylvania State University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Plasmonics provides an unparalleled method for manipulating light beyond the diffraction limit, making it a promising technology for the development of ultra-small, ultra-fast and power-efficient optical devices. To date, the majority of plasmonic devices are in the solid state and have limited tunability or configurability. Moreover, individual solid-state plasmonic devices lack the ability to deliver multiple functionalities. Here we utilize laser-induced surface bubbles on a metal film to demonstrate, for the first time, a plasmonic lens in a microfluidic environment. Our ‘plasmofluidic lens’ is dynamically tunable and reconfigurable. We record divergence, collimation and focusing of surface plasmon polaritons using this device. The plasmofluidic lens requires no sophisticated nanofabrication and utilizes only a single low-cost diode laser. Our results show that the integration of plasmonics and microfluidics allows for new opportunities in developing complex plasmonic elements with multiple functionalities, high-sensitivity and high-throughput biomedical detection systems, as well as on-chip, all-optical information processing techniques.

Date: 2013
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DOI: 10.1038/ncomms3305

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