A multi-color fast-switching microfluidic droplet dye laser

Creators: Tang, Sindy K. Y.; Li, Zhenyu; Abate, Adam R.; Agresti, Jeremy J.; Weitz, David A.; Psaltis, Demetri; Whitesides, George M.

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Abstract

We describe a multi-color microfluidic dye laser operating in whispering gallery mode based on a train of alternating droplets containing solutions of different dyes; this laser is capable of switching the wavelength of its emission between 580 nm and 680 nm at frequencies up to 3.6 kHz -— the fastest among all dye lasers reported; it has potential applications in on-chip spectroscopy and flow cytometry.

Additional Information

This journal is © The Royal Society of Chemistry 2009. Received 14th July 2009, Accepted 10th August 2009. First published as an Advance Article on the web 14th August 2009. This work was funded in part by DARPA award number W911NF-07-10647, and the Center for Optofluidic Integration at Caltech under award HR011-04-1-0032 from DARPA. A portion of this work was supported by the Micro/Nano Fluidics Fundamentals Focus (MF3) Center at the University of California, Irvine. We thank Dr. Brian Hutchison, and Dr. Darren Link from Raindance Technologies for the supply of the fluorosurfactant. We also thank Drs Claudiu Stan, Ratmir Derda, Michinao Hashimoto, and Coskun Kocabas for helpful discussions. Electronic supplementary information (ESI) available: Fig. S1, Fig. S2 and a discussion about lasing modes. See DOI: 10.1039/b914066b

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