کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1553723 | 1513245 | 2013 | 8 صفحه PDF | دانلود رایگان |
In this study, an investigation of an exciton in a disk-like quantum dot has been carried out by using the matrix diagonalization method and the compact density-matrix approach. The dependences of binding energies of excitons for the light and heavy hole masses on the size of the confining potential are analyzed explicitly. The third-order nonlinear optical susceptibility of third harmonic generation as well as the photoionization cross section has been calculated for the light-hole and heavy-hole excitons. The results are presented as a function of the incident photon energy. The results show that the third-order nonlinear optical susceptibility and the photoionization cross section of an exciton in a quantum dot are strongly affected by the dot size and the hole mass.
► The third-order susceptibility for light- and heavy-hole excitons in quantum dots is investigated.
► The binding energy is strongly affected by dot size and hole mass.
► It is possible to manage the resonance frequency and amplitude of third-order susceptibility by controlling dot size.
Journal: Superlattices and Microstructures - Volume 56, April 2013, Pages 8–15