Electromagnetically induced grating in double quantum dot system using spontaneously generated coherence

A model of electromagnetically induced grating (EIG) assisted by the spontaneously generated coherence (SGC) in the ladder-plus-Y double quantum dot (DQD) system is proposed. Using the density matrix theory, the amplitude and phase of the transmission function are studied. It is shown that the transmission is enhanced by the presence of SGC, and the resultant diffraction intensity can increase by controlling the phase. The SGC-assisted EIG controlled by two, three, and four coupling optical fields are studied respectively. Remarkably, we find that the system acquires a huge diffraction intensity when the wetting layer-quantum dot (WL-QD) field is high in the case of four coupling fields.

Automated summary

A model of EIG assisted by SGC in the ladder-plus-Y double quantum dot system is proposed, showing that transmission is enhanced by SGC presence and diffraction intensity can be increased by controlling phase. The system acquires huge diffraction intensity when the WL-QD field is high in the case of four coupling fields.