In two-dimensional heterostructures made of semiconductor and organic layers in which the respective Wannier and Frenkel excitons are in resonance, the lowest electronic excitations are of a hybrid nature. The results of a microscopic model calculation of the optical Stark effect in such hybrid excitons are presented and discussed. Significant quantitative and qualitative differences are found with respect to the well-known case of semiconductor quantum wells. In particular, depending upon the specific choice of polarization, a novel, dramatically non-monotonic dependence on detuning is predicted. (C) 1998 Elsevier Science B.V.
Optical Stark effect of hybrid excitons in organic-inorganic heterostructures
LA ROCCA, Giuseppe Carlo;
1998
Abstract
In two-dimensional heterostructures made of semiconductor and organic layers in which the respective Wannier and Frenkel excitons are in resonance, the lowest electronic excitations are of a hybrid nature. The results of a microscopic model calculation of the optical Stark effect in such hybrid excitons are presented and discussed. Significant quantitative and qualitative differences are found with respect to the well-known case of semiconductor quantum wells. In particular, depending upon the specific choice of polarization, a novel, dramatically non-monotonic dependence on detuning is predicted. (C) 1998 Elsevier Science B.V.File in questo prodotto:
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