Precise and rapid detection of optical activity for accumulative femtosecond spectroscopy

Please always quote using this URN: urn:nbn:de:bvb:20-opus-85913
  • 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.show moreshow less

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Metadaten
Author: Andreas Steinbacher, Johannes Buback, Patrick Nürnberger, Tobias Brixner
URN:urn:nbn:de:bvb:20-opus-85913
Document Type:Journal article
Faculties:Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie
Language:English
Parent Title (English):Optics Express
Year of Completion:2012
Source:In: Optics Express(2012) 20: 11, 11838-11854, doi:10.1364/OE.20.011838
URL:http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-20-11-11838&id=233249
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Release Date:2014/05/12
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2012
Licence (German):License LogoDeutsches Urheberrecht