Exciton wave functions and optical properties in a grating of quantum-well wires

A variational wave function for excitons in quantum-well wires is obtained. The reflectivity of a grating of quantum-well wires is computed by use of a Green's-function formalism for s- and p-polarized light, with the spatial dispersion and the electromagnetic coupling between the wires taken into account. The resulting energy shift between the s- and p-polarized spectra is discussed