Optical Response of Strongly Coupled Quantum Dot−Metal Nanoparticle Systems: Double Peaked Fano Structure and Bistability

Optical response of an artificial composite nanodimer comprising a semiconductor quantum dot and a metal nanosphere is analyzed theoretically. We show that internal degrees of freedom of the system can manifest bistability and optical hysteresis as functions of the incident field intensity. We argue that these effects can be observed for real-world systems, such as a CdSe quantum dot and an Au nanoparticle hybrid. These properties can be revealed by measuring the optical hysteresis of Rayleigh scattering. We also show that the total dipole moment of the system can be switched abruptly between its two stable states by small changes in the excitation intensity. The latter promises various applications in the field of all-optical processing at the nanoscale, the most basic of them being the volatile optical memory.

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“…13 To calculate the polarizability γ (ω) of the MNP, we used the tabulated data for the permittivity of gold from Ref. 29.…”

Section: Steady-state Analysismentioning

confidence: 99%

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Малышев¹,

2011

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“…In a strong exciton-plasmon coupling regime, a coherent coupling between LSPs and excitons overwhelms all losses and results in two new mixed states of light. Hence, matter is separated energetically by a Rabi splitting that exhibits a characteristic anticrossing behavior of the exciton-LSP energy tuning [32][33][34]. In this regime, a new quasi-particle (plexciton) forms with distinct properties possessed by neither original particle.…”

Section: Introductionmentioning

confidence: 99%

Exciton-plasmon coupling interactions: from principle to applications

et al. 2017

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Abstract:The interaction of exciton-plasmon coupling and the conversion of exciton-plasmon-photon have been widely investigated experimentally and theoretically. In this review, we introduce the exciton-plasmon interaction from basic principle to applications. There are two kinds of exciton-plasmon coupling, which demonstrate different optical properties. The strong exciton-plasmon coupling results in two new mixed states of light and matter separated energetically by a Rabi splitting that exhibits a characteristic anticrossing behavior of the exciton-LSP energy tuning. Compared to strong coupling, such as surface-enhanced Raman scattering, surface plasmon (SP)-enhanced absorption, enhanced fluorescence, or fluorescence quenching, there is no perturbation between wave functions; the interaction here is called the weak coupling. SP resonance (SPR) arises from the collective oscillation induced by the electromagnetic field of light and can be used for investigating the interaction between light and matter beyond the diffraction limit. The study on the interaction between SPR and exaction has drawn wide attention since its discovery not only due to its contribution in deepening and broadening the understanding of SPR but also its contribution to its application in light-emitting diodes, solar cells, low threshold laser, biomedical detection, quantum information processing, and so on.

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“…The ultracompact optical mode volume achieved in plasmon nanostructures leads to a large resonant enhancement of the local field near the MNP [1][2][3][4], as well as the modification of spontaneous emission rates of the emitter's optical transitions [5][6][7][8][9][10][11]. The exciton-plasmon coupling has received a great deal of attention leading to interesting phenomena like changes in photoluminescence lifetimes [12], in photon statistics [13], in the resonance fluorescence [14][15][16][17][18][19], in plasmon-induced quantum interference effects [20][21][22], in the control over population dynamics [23][24][25][26], and over nonlinear optical processes [27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Resonance fluorescence spectrum of aΛ-type quantum emitter close to a metallic nanoparticle

et al. 2016

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We theoretically study the resonance fluorescence spectrum of a three-level quantum emitter coupled to a spherical metallic nanoparticle. We consider the case that the quantum emitter is driven by a single laser field along one of the optical transitions. We show that the development of the spectrum depends on the relative orientation of the dipole moments of the optical transitions in relation to the metal nanoparticle. In addition, we demonstrate that the location and width of the peaks in the spectrum are strongly modified by the exciton-plasmon coupling and the laser detuning, allowing to achieve controlled strongly subnatural spectral line. A strong antibunching of the fluorescent photons along the undriven transition is also obtained. Our results may be used for creating a tunable source of photons which could be used for a probabilistic entanglement scheme in the field of quantum information processing.

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Optical Response of Strongly Coupled Quantum Dot−Metal Nanoparticle Systems: Double Peaked Fano Structure and Bistability

Cited by 247 publications

References 13 publications

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Exciton-plasmon coupling interactions: from principle to applications

Resonance fluorescence spectrum of aΛ-type quantum emitter close to a metallic nanoparticle

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