Excitons in Hybrid Organic-Inorganic Nanostructures
Bassani F.1, La Rocca G.C.1, Basko D.M.1, Agranovich V.M.2
1Scuola Normale Superiore and INFM Piazza dei Cavalieri, Pisa, Italy
2Institute of Spectroscopy of Russian Academy of Sciences, Troitsk, Moscow region, Russia
Email: larocca@ella.sns.it
Выставление онлайн: 19 апреля 1999 г.
In two-dimensional heterostructures made of semiconductor and organic layers, when resonance between the Wannier and Frenkel excitons is realized, the dipole-dipole interaction coupling them leads to novel striking effects. First, we discuss the pronounced nonlinear optical properties of the hybrid Frenkel-Wannier excitons appearing when the energy splitting of the excitonic spectrum is large compared to the exciton linewidths (the case of strong resonant coupling). Next, we consider the case of weak resonant coupling for which the Forster mechanism of energy transfer from an inorganic quantum well to an organic overlayer is of great interest: the electrical pumping of excitons in the semiconductor quantum well could be employed to efficiently turn on the organic material luminescence.
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