Precise and Rapid Detection of Optical Activity for Accumulative Femtosecond Spectroscopy
Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Wüurzburg, Germany
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We present a fast and sensitive polarimeter combining common-path optical heterodyne interferometry and accumulative spectroscopy to detect rotatory power. The sensitivity of rotatory detection is determined to be 0.10 milli-degrees for a measurement time of only one second and an interaction length of 250 μm. Its suitability for femtosecond studies is demonstrated in a non-resonant two-photon photodissociation experiment.
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