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Spectral profiles of two-photon absorption: Coherent versus two-step two-photon absorption
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).
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2005 (English)In: Organic and Nanocomposite Optical Materials / [ed] Cartwright, A; Cooper, TM; Karna, SP; Nakanishi, H, 2005, Vol. 846, 3-12 p.Conference paper, Published paper (Refereed)
Abstract [en]

We present a theory of two-photon absorption in solutions which addresses the, formation of spectral shapes taking account of the vibrational degrees of freedom. The theory is used to rationalize observed differences between spectral shapes of one- and two-photon absorption. We elaborate Oil two underlying causes. one trivial and one non-trivial, behind these differences. The first refers simply to the fact that the set of excited electronic states constituting the spectra, will have different relative cross sections for one- and two- photon absorption. The second reason is that the two-step and coherent two-photon absorption processes are competing, making the one- and two-photon spectral bands different even considering a, single final state. The theory is applied to the N-101 molecule [di-phenyl-amino-nitro-stilbene] which was recently studied experimentally in the paper.

Place, publisher, year, edition, pages
2005. Vol. 846, 3-12 p.
Series
MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS, ISSN 0272-9172 ; 846
Keyword [en]
limiting properties, chromophores
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-42996ISI: 000230391000001Scopus ID: 2-s2.0-23844464482ISBN: 1-55899-794-6 (print)OAI: oai:DiVA.org:kth-42996DiVA: diva2:447775
Conference
Symposium on Organic and Nanocomposite Optical Materials held at the 2004 MRS Fall Meeting. Boston, MA. NOV 28-DEC 03, 2004
Note
QC 20111013Available from: 2011-10-13 Created: 2011-10-13 Last updated: 2012-03-22Bibliographically approved

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Ågren, Hans

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