Journal
OPTICS LETTERS
Volume 29, Issue 17, Pages 1974-1976Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.29.001974
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We demonstrate highly efficient evanescent-wave detection of fluorophore-labeled biomolecules in aqueous solutions positioned in the air holes of the microstructured part of a photonic crystal fiber. The air-suspended silica structures located between three neighboring air holes in the cladding crystal guide light with a large fraction of the optical field penetrating into the sample even at wavelengths in the visible range. An effective interaction length of several centimeters is obtained when a sample volume of less than 1 muL is used. (C) 2004 Optical Society of America.
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