Optical properties of coupled metal-semiconductor and metal-molecule nanocrystal complexes: Role of multipole effects

Yan, Jie-Yun; Zhang, Wei; Duan, Suqing; Zhao, Xian-Geng; Govorov, Alexander O.

doi:10.1103/physrevb.77.165301

Cited by 220 publications

(229 citation statements)

References 34 publications

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“…A quantitatively accurate model for calculating the scattering spectrum of this simplest MNP-QD hybrid structure remains a challenge. Higher-order multipole effects of the MNP and QD (28), the nanoparticle's geometrical deviation from a perfect sphere, and all relevant electronic transitions in QDs need to be taken into account to quantitatively reproduce the experimental observations.…”

Section: Significancementioning

confidence: 99%

Single quantum dot controls a plasmonic cavity’s scattering and anisotropy

Hartsfield

Chang

Yang

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Plasmonic cavities represent a promising platform for controlling light-matter interaction due to their exceptionally small mode volume and high density of photonic states. Using plasmonic cavities for enhancing light's coupling to individual two-level systems, such as single semiconductor quantum dots (QD), is particularly desirable for exploring cavity quantum electrodynamic (QED) effects and using them in quantum information applications. The lack of experimental progress in this area is in part due to the difficulty of precisely placing a QD within nanometers of the plasmonic cavity. Here, we study the simplest plasmonic cavity in the form of a spherical metallic nanoparticle (MNP). By controllably positioning a semiconductor QD in the close proximity of the MNP cavity via atomic force microscope (AFM) manipulation, the scattering spectrum of the MNP is dramatically modified due to Fano interference between the classical plasmonic resonance of the MNP and the quantized exciton resonance in the QD. Moreover, our experiment demonstrates that a single two-level system can render a spherical MNP strongly anisotropic. These findings represent an important step toward realizing quantum plasmonic devices.optical spectroscopy | hybrid nanostructures | quantum systems | plasmonic cavities | Fano resonance M any quantum network and quantum information processing schemes build upon the enhanced light-matter interaction between a single quantum emitter and a cavity, enabling the effective conversion between photonic and matterbased quantum states (1-4). For example, if the absorption of a photon by a single atom placed inside a cavity can render it transparent to a second photon, then a variety of promising quantum information processing devices can be envisioned including quantum phase gates and repeaters (5). Such QED effects require a high atomic cooperativity c ¼ g 2 γk , where the coupling strength g 2 ∝ 1=V is inversely proportional to the volume of the cavity mode V (6). γ and k are the linewidth of the atomic transition and the cavity mode, respectively. Typically, a high cavity quality factor Q (or low k) of conventional photonic cavities is required to compensate for relatively large (diffraction-limited) mode volumes and comes at a cost: The narrow linewidth of cavity modes places stringent requirements on their spectral alignment with the frequencies of quantum transitions. Plasmonic cavities, on the other hand, achieve high values of C while maintaining moderate Q values because of their ultrasmall modal volume (7-10). The relaxed spectral alignment requirements facilitate the experimental realization of various quantum phenomena, such as collective photon emission from a small ensemble of emitters (11) and single photon sources with tunable statistical properties (12).Prior experiments exploring cavity QED effects associated with single emitters coupled to plasmonic cavities or waveguides focused almost exclusively on the observations of reducing the emitter's lifetime due to the enhanced radiative (propor...

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Section: Significancementioning

confidence: 99%

Single quantum dot controls a plasmonic cavity’s scattering and anisotropy

Hartsfield

Chang

Yang

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…The latter absorbs all information governing the SQD self-action, such as the material constants, geometry of the system, and details of the interaction (e.g., contributions of higher multipoles). 20 In a number of recent publications dealing with the same system, a different formula for the constant G was used in which the factor ε s appears squared in the denominator of the G. [12][13][14][15][16][17][18][19][20] The second factor, ε s , is supposed to take into account the screening of the dipole field by the SQD dielectric response. We note, however, that it is the product GR that determines the latter field, and as shown by Eq.…”

Section: Formalismmentioning

confidence: 99%

“…The role of the multipole SQD-MNP interaction in explaining the spectra of hybrid systems has been discussed in detail in Ref. 20. All these effects depend on both geometrical parameters and material properties of hybrid clusters, providing an excellent opportunity for more fine-grained control of spectral and dynamical properties of nanoscale objects.…”

Section: Introductionmentioning

confidence: 99%

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Малышев¹,

2011

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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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“…As an example, the energy transfer takes place between emitters and metallic surfaces or nanostructures [8,9,10], which feature strong plasmonic oscillations of free electrons.…”

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confidence: 99%

Dependence of the energy transfer to graphene on the excitation energy

Maćkowski

Kamińska

2015

Applied Physics Letters

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Fluorescence studies of natural photosynthetic complexes on a graphene layer demonstrate pronounced influence of the excitation wavelength on the energy transfer efficiency to graphene. Ultraviolet light yields much faster decay of fluorescence, with average efficiencies of the energy transfer equal to 87% and 65% for excitation at 405 nm and 640 nm, respectively. This implies that focused light changes locally the properties of graphene affecting the energy transfer dynamics, in an analogous way as in the case of metallic nanostructures. Demonstrating optical control of the energy transfer is important for exploiting unique properties of graphene in photonic and sensing architectures.

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Optical properties of coupled metal-semiconductor and metal-molecule nanocrystal complexes: Role of multipole effects

Cited by 220 publications

References 34 publications

Single quantum dot controls a plasmonic cavity’s scattering and anisotropy

Single quantum dot controls a plasmonic cavity’s scattering and anisotropy

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Dependence of the energy transfer to graphene on the excitation energy

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