Abstract
The excited-state photoabsorption spectrum by an electron and a hole confined in spherical quantum dots is calculated. As the dot size is reduced, the calculated absorption peak shifts to the high-energy side, and splits into two peaks in the limit of strong confinement. This splitting represents the changeover of the quantum size effect of the zero-dimensional excitons. Our theoretical result is in agreement with experimental data for the transient infrared absorption spectra under size-selective excitation observed for CuCl nanocrystals embedded in NaCl crystals.
- Received 6 October 1998
DOI:https://doi.org/10.1103/PhysRevB.59.9826
©1999 American Physical Society
