Dipole-dipole interaction between a quantum dot and a graphene nanodisk

Cox, Joel D.; Singh, Mahi R.; Gumbs, Godfrey; Antón, Miguel A.; Carreño, F.

doi:10.1103/physrevb.86.125452

Cited by 104 publications

(66 citation statements)

References 54 publications

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“…The impact of the MNP on the QD is only the near field of the bright plasmon excited by the incident control field. The splitting of sidebands in the EIT window increases as the distance R decreases due to the weak QD-plasmon interaction [45]. This steady solution can be obtained under the condition that the initial state of the QD |ψ(0) = |1 (See Fig.…”

Section: Discussionmentioning

confidence: 92%

Quantum-dot gain without inversion: Effects of dark plasmon-exciton hybridization

Zhao

et al. 2014

Phys. Rev. B

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We propose an initial-state-dependent quantum-dot gain without population inversion in the vicinity of a resonant metallic nanoparticle. The gain originates from the hybridization of a dark plasmon-exciton and is accompanied by efficient energy transfer from the nanoparticle to the quantum dot. This hybridization of the dark plasmon-exciton, attached to the hybridization of the bright plasmon-exciton, strengthens nonlinear light-quantum emitter interactions at the nanoscale, thus the spectral overlap between the dark and the bright plasmons enhances the gain effect. This hybrid system has potential applications in ultracompact tunable quantum devices.

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Section: Discussionmentioning

confidence: 92%

Quantum-dot gain without inversion: Effects of dark plasmon-exciton hybridization

Zhao

et al. 2014

Phys. Rev. B

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“…Parameter & l;r (u) is the depolarization factor and is de-…ned in Ref. (Cox et al 2010) and it depends on the shape of the nanorod (u = r=l).…”

Section: Theorymentioning

confidence: 99%

Energy transfer between a biological labelling dye and gold nanorods

Racknor

Singh

Zhang

et al. 2013

Methods Appl. Fluoresc.

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We have demonstrated energy transfer between a biological labelling dye (Alexa Fluor 405) and gold nanorods experimentally and theoretically. The fluorescence lifetime imaging microscopy and density matrix method are used to study a hybrid system of dye and nanorods under one- and two-photon excitations. Energy transfer between dye and nanorods via the dipole-dipole interaction is found to cause a decrease in the fluorescence lifetime change. Enhanced energy transfer from dye to nanorods is measured in the presence of an increased density of nanorods. This study has potential applications in fluorescence lifetime-based intra-cellular sensing of bio-analytes as well as nuclear targeting cancer therapy.

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“…When QDs are transferred to graphene ( Fig. 4(b)), it shows the strong carrier transfer from the QDs to the graphene due to its zero bandgap nature, to enhance the nonradiative decay rate of the QD by more than 10 times [24][25][26][27] .…”

Section: Resultsmentioning

confidence: 99%

Laser Shock Tuning Dynamic Interlayer Coupling in Graphene–Boron Nitride Moiré Superlattices

et al. 2018

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2018). Laser shocking tuning dynamic interlayer coupling in graphene-boron nitride moiré superlattices. Nano Letters. https://doi. Abstract:Following in the emerging of graphene and many two-dimensional (2D) materials, the most exciting applications come from stacking them into 3D devices, promising many excellent possibilities for neoteric electronics and optoelectronics. Layers of semiconductors, insulators and conductors can be stacked to form van der Waals heterostructures, after the weak bonds formed between the layers. However, the interlayer coupling in these heterostructures is usually hard to modulate, resulting in difficulty to realize their emerging optical or electronic properties. Especially, the relationship between interlayer distance and interlayer coupling remains to be investigated, due to the lack of effective technology. In this work, we have used laser shocking to controllably tune the interlayer distance between graphene (Gr) and Boron Nitride (BN) in the Gr/BN/Gr heterostructures and the strains in the 2D heterolayers, providing a simple and effective way to modify their optic and electronic properties. After lase shocking, the reduction of interlayer distance is calculated by Molecular dynamics (MD) simulation. Some atoms in Gr or BN are out-of-plane as well. In Raman measurements, G peak in the heterostructure shows a red-shifted trend after laser shocking, indicating the strong phonon coupling in the interlayer. Moreover, the larger transparency after laser shocking also verifies the stronger photon coupling in the heterostructure. To investigate the effects of the interlayer coupling of heterostructure on its out-of-plane electronic behavior, we have investigated the electronic tunneling behavior. The heterostructure after laser shock reveals lager tunneling current and lower tunneling threshold, proving unexpected better electrical property. From DFT calculations, laser shocking can modulate band gap structure of graphene in Gr/BN/Gr heterostructures, therefore the heterostructures can be implemented as a unique photonic platform to modulate the emission characters of the anchored CdSe/ZnS coreshell quantum dots. Remarkably, the effective laser shocking method is also applicable to various otherwise noninteracting 2D materials, resulting in many new phenomena which will lead science and technology to unexplored territories.

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Dipole-dipole interaction between a quantum dot and a graphene nanodisk

Cited by 104 publications

References 54 publications

Quantum-dot gain without inversion: Effects of dark plasmon-exciton hybridization

Quantum-dot gain without inversion: Effects of dark plasmon-exciton hybridization

Energy transfer between a biological labelling dye and gold nanorods

Laser Shock Tuning Dynamic Interlayer Coupling in Graphene–Boron Nitride Moiré Superlattices

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