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Surface-enhanced Raman scattering microchip fabricated by femtosecond laser

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Abstract

We report a surface-enhanced Raman scattering (SERS) microchip that is capable of measuring SERS signals of liquid samples with high sensitivity. The microdevice is an integration of a silicon-based SERS substrate, a multimode optical fiber (MMF), and a microchannel embedded in the photosensitive glass fabricated by the femtosecond laser followed by thermal treatment, wet etching, and annealing. The performance of the SERS microchip is evaluated by measuring rhodamine 6G using a 632.8nm He–Ne laser at 4.3mW excitation power, which reveals that the detection limit is lower than 1010M at a 1s short accumulation time.

© 2010 Optical Society of America

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