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Spectrally multiplexed photothermal OCT and novel detection methods

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Abstract

We demonstrate simultaneous detection of two nanoparticle species using phase-sensitive optical coherence tomography with photothermal excitation at two wavelengths matched to the distinct absorption peaks of the nanoparticles. To minimize bulk heating of the sample, a novel single-pulse excitation scheme is proposed and its sensitivity is characterized.

© 2012 Optical Society of America

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