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Plasmonics

Controlling Double Quantum Coherence and Electromagnetic Induced Transparency with Plasmonic Metallic Nanoparticle

C. H. Raymond Ooi, Kai Shuen Tan

Published Mar 6, 2013• 13 citations
Publisher
DOI
10.1007/s11468-013-9487-0

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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 Qtotal value (10−5 W) under 0.2 W/cm2 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 ( QQD) and MNP ( QMNP) 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.
We study the variation of the energy absorption rate in a hybrid semiconductor quantum dot-metallic nanoparticle system doped in a photonic crystal. The quantum dot is taken as a three-level V-configuration system and is driven by two applied fields (probe and control). We consider that one of the excitonic resonance frequencies is near to the plasmonic resonance frequency of the metallic nanoparticle, and is driven by the probe field. The other excitonic resonance frequency is far from both the plasmonic resonance frequency and the photonic bandgap edge, and is driven by the control field. In the absence of the photonic crystal we found that the system supports three excitonic-induced transparencies in the energy absorption spectrum of the metallic nanoparticle. We show that the photonic crystal allows us to manipulate the frequencies of such excitonic-induced transparencies and the amplitude of the energy absorption rate.
Abstract In this work, we theoretically study a novel strategy for electromagnetically induced gratings in a complex hybrid system consisting of semiconductor quantum dots (SQDs) and metallic nanoparticles (MNPs). The plasmonic resonances of MNPs and the quantum coherence of SQDs enable the generation of unique optical phenomena such as electromagnetically induced transparency via interactions with light. Through surface plasmon interactions and quantum dot interdot tunneling, the modification of light diffraction efficiency into higher orders is achievable. Doppler broadening and nonlocality are included in the model to offer a more realistic picture of the system’s behavior in real-world scenarios. Our proposed model shows significant promise for applications in sensing technologies and nanophotonics, where it has the potential to enhance sensitivity and improve the performance of optical devices.