Plasmonic electromagnetic-induced transparency from double quantum dot–metal nanoparticle structure

This work studies the energy absorption rates in the case of plasmonic electromagnetically induced transparency (PEIT) from the double quantum dot (DQD)–metal nanoparticle (MNP) system. The orthogonalized plane wave between the wetting layer (WL) and QD transitions is considered. PEIT is not attained under a single applied field. It is obtained under a probe, pump, and two tunneling components. Two asymmetric PEIT windows can result from the transitions between the sixth energy states of the DQD structure. A huge Q total value (10 −5 W) under 0.2 W/cm 2 is obtained. Compared with other works, this result is higher by four orders, and the power applied is less by six orders than that used in earlier works. Our results exceed those obtained with double MNP-QD, QD-six MNP, and MNP-ten QDs. Such a vast result is ascribed to the manipulation flexibility in the DQD system, which is not found in all other structures. This possibility increases quantum correlation and the nonlinear optical properties of the DQD and the DQD–MNP system. The QD ( Q QD ) and MNP ( Q MNP ) absorption energy rates are also studied. Applying two tunneling components restores the system to peak at resonance due to the coupled work of the two dots as a DQD system. Strong plasmon–exciton coupling occurs when the probe power becomes considerable. Thus, the probe must not be so small.