Presurface exciton spectrum at finite temperatures

Abstract

The Hamiltonian of the presurface excitons interacting with the bulk and interface phonons in a heterosystem with a plane interface is obtained in the representation of second quantization in all variables. The spectrum parameters (shift and half-width) of the shape function of the basic band at arbitrary temperatures are calculated with the help of the Green function method. The temperature dependence of the spectrum parameters is studied and the physical mechanism of their formation is established on the example of particular heterosystems. B IIpe,QCTaBJIeHHH BTOPlisHOrO KBaHTOBaHHR no BCeM IIepeMeHHbIM CHCTeMbI HafiAeH raMHJIbTOHHaH IIpHIIOBepXHoCTHbIX 3KCHTOHOB, B3aHMOAefiCTByIoI4HX C 065eMHbIMH H IIOBePXHOCTHblMIl (POHOHaMIl

Bose condensation of squeezed light

“…The effect of quantum confinement on excitons is investigated in quantum dots of indirectgap materials [13]. In single heterostructures the size quantization is absent and e-h interaction with their images can cause exciton localization near the contacting medium surface creating of presurface excitons [14]. Giant permanent dipole moments of excitons are found in semiconductor nanostructures [15] and dipolaritons with electric dipole moment in tunnel-coupled quantum wells have been investigated in [16].…”