A diffractive imaging micro spectrometer that exhibits good spectral and spatial resolution is a very useful lab-on-a-chip device that can be integrated into biosensors. We have demonstrated the possibility of such a micro spectrometer experimentally. The coupled input signal was the fluorescence emanating from a miniature drop of rhodamine dye in methanol excited by Ar+-ion laser of power less than 1 mW.

© 2004 Optical Society of America

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