We introduce for the first time the implementation of optofluidic lock-in spectroscopy of sub-nanoliter analyte on a microfluidic chip. Two methods, spatial modulation and pneumatic modulation with integrated optofluidic modulator, were demonstrated. (C) 2009 Optical Society of America
Davide Ferri, Oliver Kröcher, Rob Jeremiah G. Nuguid
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Christoph Merten, Jatin Panwar