Linear optical response of hybrid states

If an incident electromagnetic wave with the electric field (r) = oeiCir is present, then the interaction with the hybrid structure is described by the Hamiltonian (neglecting local field corrections) 

At the crossing point k = ko (for S 0) we have Aa(ko) 2 = 1/2 and the FE oscillator strength is equally distributed between the two hybrid states. For the hybrid exciton radii the opposite relation holds. Calculating the expectation value of the exciton radius squared f2 in the state a, k) we obtain 

Concerning the choice of materials for the implementation of the system considered here, examples of molecular substances having small-radius ( 0.5 nm) excitons with energies of a few eV, among those already successfully grown (17) as crystalline layers on a variety of inorganic (including semiconductor) crystals, are the acenes, such as tetracene (2 eV) or pentacene (1.5 eV), the metal 

We also mention here the work (29), where the effects of the exciton-phonon interaction in hybrid systems were studied. In this work resonant Raman spectroscopy is also suggested as a tool for studying hybrid organic-inorganic QWs. 

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