Energy absorbed from double quantum dot-metal nanoparticle hybrid system

Abstract

This work proposes the double quantum dot (DQD)-metal nanoparticle (MNP) hybrid system for a high energy absorption rate. The structure is modeled using density matrix equations that consider the interaction between excitons and surface plasmons. The wetting layer (WL)-DQD transitions are considered, and the orthogonalized plane wave (OPW) between these transitions is considered. The DQD energy states and momentum calculations with OPW are the figure of merit recognizing this DQD-MNP work. The results show that at the high pump and probe application, the total absorption rate $$({Q}_{tot})$$ ( Q tot ) of the DQD-MNP hybrid system is increased by reducing the distance between DQD-MNP. The high $${Q}_{tot}$$ Q tot obtained may relate to two reasons: first, the WL washes out modes other than the condensated main mode. Second, the high flexibility of manipulating DQD states compared to QD states results in more optical properties for DQD. The $${Q}_{DQD}$$ Q DQD is increased at a small MNP radius on the contrary to the $${Q}_{MNP}$$ Q MNP which is increased at a wider MNP radius. Under high tunneling, a broader blue shift in the $${Q}_{tot}$$ Q tot due to the destructive interference between fields is seen and the synchronization between $${Q}_{MNP}$$ Q MNP and $${Q}_{DQD}$$ Q DQD is destroyed. $${Q}_{tot}$$ Q tot for the DQD-MNP is increased by six orders while $${Q}_{DQD}$$ Q DQD is by eight orders compared to the single QD-MNP hybrid system. The high absorption rate of the DQD-MNP hybrid system comes from the transition possibilities and flexibility of choosing the transitions in the DQD system, which strengthens the transitions and increases the linear and nonlinear optical properties. This will make the DQD-MNP hybrid systems preferable to QD-MNP systems.

Engineering of plasmonic electromagnetically induced transparency from double quantum dot-metal nanoparticle structure

“…This possibility increases quantum correlation and the nonlinear properties of the DQD and the DQD-MNP system. 10,11,22 Figure 5 compares the results of our approach with the case of ignoring the WL. A similar shape results from the system without WL as it still has four energy states (see Fig.…”

“…This disallowance is confirmed through the orthogonalized plane wave (OPW). 10 Considering OPW makes the simulation resemble the practice of the QD structure. Experimentally measured data are more convincing when underhand the for the required sizes of the materials, which is impossible.…”

“…Due to the flexibility of carrier manipulation in the double QD (DQD) system, the DQD-MNP hybrid system is studied for best results in the plasmon-exciton behavior. [10][11][12][13] PEIT is studied here in the DQD-MNP in the strong coupling case. The OPW between WL-DQD is taken here.…”

Enhanced Nonlinear Optical Susceptibilities of Semiconductor Quantum Dot in Metal Nanoparticle-Graphene Nanodisk-Quantum Dot Hybrid System

“…The transport properties of a single plasmon interacting with this hybrid system have been studied [14]- [16]. Recently, a double quantum dot (DQD)-metal nanoparticle (MNP) hybrid system has been proposed for high energy absorption rate [17]. The competition between local field enhancement and nonradiative resonant energy transfer in the linear absorption of a semiconductor quantum dot coupled to a metal nanoparticle has also been investigated [18].…”

Absorption and Dispersion Properties of a Coupled Asymmetric Double Quantum Dot Molecule–Metal Nanoparticle Structure

“…When semiconductor quantum dots and metal nanoparticles (MNPs) are placed close to each other, with distances in range of a few nanometers, coupled nanostructures are created that have, in many cases, enhanced optical properties in comparison to the individual components. Recently, attention has been given to the optical properties of a coupled nanostructure fabricated by coupling a metal nanoparticle to a double-semiconductor quantum dot molecule [7][8][9][10].…”