Precise and rapid detection of optical activity for accumulative femtosecond spectroscopy
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- We present polarimetry, i.e. the detection of optical rotation of light polarization, in a configuration suitable for femtosecond spectroscopy. The polarimeter is based on common-path optical heterodyne interferometry and provides fast and highly sensitive detection of rotatory power. Femtosecond pump and polarimeter probe beams are integrated into a recently developed accumulative technique that further enhances sensitivity with respect to single-pulse methods. The high speed of the polarimeter affords optical rotation detection during theWe present polarimetry, i.e. the detection of optical rotation of light polarization, in a configuration suitable for femtosecond spectroscopy. The polarimeter is based on common-path optical heterodyne interferometry and provides fast and highly sensitive detection of rotatory power. Femtosecond pump and polarimeter probe beams are integrated into a recently developed accumulative technique that further enhances sensitivity with respect to single-pulse methods. The high speed of the polarimeter affords optical rotation detection during the pump-pulse illumination period of a few seconds. We illustrate the concept on the photodissociation of the enantiomers of methyl p-tolyl sulfoxide. The sensitivity of rotatory detection, i.e. the minimum rotation angle that can be measured, is determined experimentally including all noise sources to be 0.10 milli-degrees for a measurement time of only one second and an interaction length of 250 μm. The suitability of the presented setup for femtosecond studies is demonstrated in a non-resonant two-photon photodissociation experiment.…
Autor(en): | Andreas Steinbacher, Johannes Buback, Patrick Nürnberger, Tobias Brixner |
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URN: | urn:nbn:de:bvb:20-opus-85913 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Optics Express |
Erscheinungsjahr: | 2012 |
Originalveröffentlichung / Quelle: | In: Optics Express(2012) 20: 11, 11838-11854, doi:10.1364/OE.20.011838 |
URL der Erstveröffentlichung: | http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-20-11-11838&id=233249 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Datum der Freischaltung: | 12.05.2014 |
Sammlungen: | Open-Access-Publikationsfonds / Förderzeitraum 2012 |
Lizenz (Deutsch): | Deutsches Urheberrecht |