We consider nanostructures consisting of both organic and inorganic materials, in particular, heterojunctions or coupled microcavities. Resonance interactions between Frenkel excitons and Wannier-Mott excitons (through the Coulomb dipole-dipole interaction at an interface or through the cavity photons in coupled microcavities) may bring about hybrid Frenkel-Wannier-Mott excitations. In such a situation, the properties of both molecular and covalent crystals conspire to overcome the basic limitations of the individual constituents. We show that the new hybrid states and their dispersion curves can be tailored to engineer the enhancement of resonant optical nonlinearities, fluorescence efficiency and relaxation processes.
Organic-inorganic interfaces and microcavities with hybrid excitons
LA ROCCA, Giuseppe Carlo;
1998
Abstract
We consider nanostructures consisting of both organic and inorganic materials, in particular, heterojunctions or coupled microcavities. Resonance interactions between Frenkel excitons and Wannier-Mott excitons (through the Coulomb dipole-dipole interaction at an interface or through the cavity photons in coupled microcavities) may bring about hybrid Frenkel-Wannier-Mott excitations. In such a situation, the properties of both molecular and covalent crystals conspire to overcome the basic limitations of the individual constituents. We show that the new hybrid states and their dispersion curves can be tailored to engineer the enhancement of resonant optical nonlinearities, fluorescence efficiency and relaxation processes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
