Slow light in a double quantum dot system

The density matrix theory models the slow light in a waveguide containing a double quantum dot system. This work considers the waveguide and material dispersions, the wetting layer-quantum dot (WL-QD) transitions, and the orthogonalized plane wave between them. These considerations are not taken else. The optical fields between WL-QD states do not increase the slowing down. Under increasing the probe field by one order, the slowdown factor (S) is increased by three orders while the susceptibility is by two orders, referring to the importance of the probe field. Tunneling is more effective in controlling susceptibility than probe field. This result predicts a new generation of all-optical devices.