Two-Dimensional Excitons in an Inorganic-Organic Quantum-Well Material

Abstract

Ideal two-dimensional Wannier excitons have been shown to exist in an inorganic-organic-hybridized quantum-well material in which two-dimensional inorganic semiconductor layers are sandwiched between organic layers. The exciton fine-structure energy splitting and biexciton binding energy are one order of magnitude larger than those of normal inorganic semiconductors owing to the strong two-dimensional confinement. These exceptional properties offer a best platform for investigating excitonic systems. In this review, we present basic properties of excitons in this material and the associated optical nonlinearities. Peculiar functions introduced by the combination with excited states in the organic barrier layers are also presented.