Evaluation of emission cross section of CdSe quantum dots for laser applications

Abstract

The film doping with CdSe/ZnS quantum dots has been fabricated and the emission cross sections of CdSe/ZnS quantum dots have been obtained by applying the McCumber theory. With the calculated emission cross sections depending on wavelengths the emission lifetime of 1.12 ns is obtained. By comparison of the calculated lifetime and previously reported ones, we find excellent agreement between the measured and calculated ones. It has been found that the McCumber theory can still be used to calculate the emission cross sections of quantum dots with discrete energy level structure.