Electronic and vibronic contributions to two-photon absorption of molecules with multi-branched structures
2000 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 113, no 17, 7055-7061 p.Article in journal (Refereed) Published
The electronic and vibronic contributions to the two-photon absorption of a series molecules with multi-branched structures have been studied using ab initio response theory. The results indicate that the electronic coupling between different branches alone cannot explain the experimental finding of a strong enhancement of the two-photon absorption cross section over the single branch structure, whereas it is predicted that vibronic contributions can play an important role in this respect. It is shown that for multi-branched molecules the use of circularly polarized light can increase the two-photon absorption cross section by a factor of 1.5 over linearly polarized light excitation.
Place, publisher, year, edition, pages
2000. Vol. 113, no 17, 7055-7061 p.
2-photon absorption, cross-sections, spectrum, benzene, mechanisms, oligomers, design
IdentifiersURN: urn:nbn:se:kth:diva-20130ISI: 000090132900004OAI: oai:DiVA.org:kth-20130DiVA: diva2:338823
QC 201005252010-08-102010-08-10Bibliographically approved