Self-sustained pulsation of amplified spontaneous emission of molecules in solution
2006 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 39, no 2, 215-227 p.Article in journal (Refereed) Published
Temporal oscillations of amplified spontaneous emission of molecules are studied theoretically. From the proposed theory and numerical simulations, it is found that the self-pulsations originate in an interplay between stimulated emission and saturable absorption. A stability analysis demonstrates the crucial role of the photoabsorption in this process, which can be regulated by a proper choice of buffer molecules. Variations in the saturable absorption mediate a transition from damped oscillations to self-sustained pulsations. The role of propagation effects as well as of the interaction of co- and counter-propagating pulses is also investigated. Numerical simulations, demonstrating the theoretical findings, are performed for a model 3-level system and for an organic chromophore; 4-[N-(2-hydroxyethyl)-N-(methyl)amino phenyl]-4'-(6-hydroxyhexyl sulphonyl) stilbene.
Place, publisher, year, edition, pages
2006. Vol. 39, no 2, 215-227 p.
Computer simulation; Damping; Light absorption; Mathematical models; Molecular dynamics; Oscillations; Stimulated emission; Buffer molecules; Damped oscillations; Self-sustained pulsation; Stability analysis; Spontaneous emission
IdentifiersURN: urn:nbn:se:kth:diva-5488DOI: 10.1088/0953-4075/39/2/002ISI: 000235457800005ScopusID: 2-s2.0-29144478864OAI: oai:DiVA.org:kth-5488DiVA: diva2:9871
QC 201008132006-03-152006-03-152010-08-13Bibliographically approved