Two-Photon Absorption Circular Dichroism: A new twist of nonlinear spectroscopy
2010 (English)In: CHEMISTRY-A EUROPEAN JOURNAL, ISSN 0947-6539, Vol. 16, no 11, 3504-3509 p.Article in journal (Refereed) Published
Most biological processes in nature are marked with a distinctive fingerprint: they only involveleft-handed molecules. This is one of the reasons why a thorough understanding of the chemical,physical and optical properties of chiral molecules and structures is of great significance for thescientific community. Chiroptical activity is commonly quantified in terms of one-photoncircular dichroism measurements. However, to uncover unusual chiroptical effects, polarizationdependent two-photon absorption becomes a useful spectroscopic alternative. The ability tocontrol at will the polarization of the photons that mediate the transition can increase thefundamental understanding regarding light-matter interactions in chiral systems. Herein wereport on the first experimental measurement of the two-photon absorption circular dichroismspectra and its theoretical support. The finding of new nonlinear fingerprints in chiral moleculesoffers new opportunities in the recognition and understanding of optically active systems inregions where CD present strong limitations.
Place, publisher, year, edition, pages
2010. Vol. 16, no 11, 3504-3509 p.
chirality; circular dichroism; two-photon absorption
IdentifiersURN: urn:nbn:se:kth:diva-10339DOI: 10.1002/chem.200902286ISI: 000276058100027ScopusID: 2-s2.0-77949283887OAI: oai:DiVA.org:kth-10339DiVA: diva2:216110
QC 201007272009-05-072009-05-072011-01-19Bibliographically approved