The inhibition of optical excitations and enhancement of Rabi flopping in hybrid quantum dot–metallic nanoparticle systems

Sadeghi, Seyed M.

doi:10.1088/0957-4484/20/22/225401

Cited by 99 publications

(119 citation statements)

References 26 publications

Supporting

Mentioning

110

Contrasting

Unclassified

Order By: Relevance

“…[54,55]. Thus, the MNP acts as a nanoscale cavity which decreases/enhances the strength of the vacuum fluctuations depending ω spy lies above/below the atomic transition frequency ω 41 . In summary, all these facts indicate that the engineering of the shape and the size of the nanospheroid can be used to enhance on demand the spontaneous emission in a selected atomic transition of the QD.…”

Section: Resultsmentioning

confidence: 99%

“…In the above equations, Ω c is the renormalized Rabi frequency associated with the driving field and the field produced by the induced dipole moment P (x) MN P of the MNP. Note that G c is a complex quantity whose imaginary part represents the Förster energy transfer rate from the QD to the MNP, while its real part accounts for the red shift of the QD transition caused by the plasmonic interaction [20,41].…”

Section: (X)mentioning

confidence: 99%

See 1 more Smart Citation

Resonance fluorescence spectrum of ap-doped quantum dot coupled to a metallic nanoparticle

2013

View full text Add to dashboard Cite

The resonance fluorescence spectrum (RFS) of a hybrid system consisting of a p-doped semiconductor quantum dot (QD) coupled to a metallic nanoparticle (MNP) is analyzed. The quantum dot is described as a four-level atom-like system using the density matrix formalism. The lower levels are Zeeman-split hole spin states and the upper levels correspond to positively charged excitons containing a spin-up, spin-down hole pair and a spin electron. A linearly polarized laser field drives two of the optical transitions of the QD and produces localized surface plasmons in the nanoparticle which act back upon the QD. The frequencies of these localized plasmons are very different along the two principal axes of the nanoparticle, thus producing an anisotropic modification of the spontaneous emission rates of the allowed optical transitions which is accompanied by very minor local field corrections. This manifests into dramatic modifications in the RFS of the hybrid system in contrast to the one obtained for the isolated QD. The RFS is analyzed as a function of the nanoparticle's aspect ratio, the external magnetic field applied in the Voigt geometry, and the Rabi frequency of the driving field. It is shown that the spin of the QD is imprinted onto certain sidebands of the RFS, and that the signal at these sidebands can be optimized by engineering the shape of the MNP.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: (X)mentioning

confidence: 99%

Resonance fluorescence spectrum of ap-doped quantum dot coupled to a metallic nanoparticle

2013

View full text Add to dashboard Cite

show abstract

“…The real part of G j refers to the redshift of the SQD transition caused by the plasmonic effects. 23,33 It should be noted that the excitation with circularly polarized fields would manifest as an overall extra phase factor of π/2 affecting only one of the Rabi frequencies, whereas the G j factors remain unaltered. The phase factor has no influence on the dynamics of the system, thus this kind of excitation would produce the same result as the one obtained with the simultaneous excitation with linearly polarized fields in the current system.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…When SQDs are placed in close proximity to a MNP, exciton-plasmon coupling can lead to a dramatic change in the optical properties. This includes enhancement or suppression of their emission, 31 shift and broadening of their excitonic transitions, 31,32 enhancement of the Rabi flopping, 33 and optical bistability. 34 The broadening of excitonic transitions is related to Förster energy transfer from SQDs to MNPs, which is ultimately dissipated in the form of heat.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic effects in excitonic population transfer in a driven semiconductor–metal nanoparticle hybrid system

et al. 2012

View full text Add to dashboard Cite

We have investigated the coherent transfer of excitonic populations in a semiconductor quantum dot (SQD) modulated by the surface plasmon of a metallic nanoparticle (MNP). The SQD is considered as a three-level V-type atomic system. We applied a transform-limited laser pulse field resonant with the upper atomic levels of the SQD. When the SQD is close enough to the MNP, the otherwise equally populated atomic levels can be selectively excited. Selectivity population can be achieved by two physical mechanisms: an enhancement of the Rabi frequencies that drive the optical transitions, which depends on the polarization arrangement, and a frequency shift of the optical transitions that leads to a dynamical detuning.

show abstract

“…The intriguing features of these systems arise from the hybridization of different types of optical excitations, in particular, excitons (in the quantum emitter) and plasmons (in the metal). The exciton-plasmon coupling can drastically modify the optical response of hybrids, leading to interesting physical phenomena, such as optical bistability [8][9][10][11][12], exciton-induced transparency [13], enhancement of Rabi oscillations [14], suppression of quantum coherence via infrared-driven coherent exciton-plasmon coupling [15,16], florescence [17,18], Förster energy transfer [19][20][21][22], photoluminescence quenching [23], Fano-like absorption [8,[24][25][26][27][28], and other exciting effects [29][30][31][32][33][34]. These phenomena may have a strong impact on the development of active nanophotonic devices and metamaterials (e.g., optical switches, singlephoton sources, biosensors).…”

Section: Introductionmentioning

confidence: 99%

Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle

2015

View full text Add to dashboard Cite

Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle Nugroho, Bintoro S.; Malyshev, V.A.; Knoester, Jasper IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Publication date: 2015Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Nugroho, B. S., Malyshev, V. A., & Knoester, J. (2015). Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle. Physical Review B, 92(16), [165432]. DOI: 10.1103/PhysRevB.92.165432 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. We study theoretically the optical response of a nanohybrid comprising a symmetric quantum dimer emitter coupled to a metal nanoparticle (MNP). The interactions between the exitonic transitions in the dimer and the plasmons in the MNP lead to interesting effects in the composite's input-output characteristics for the light intensity and the absorption spectrum, which we study in the linear and nonlinear regimes. We find that the exciton-plasmon hybridization leads to optical bistability and hysteresis for the one-exciton transition and enhancement of excitation for the two-exciton transition. The latter leads to a significant decrease in the field strength needed to saturate the system. In the linear regime, the absorption spectrum has a dispersive (Fano-like) line shape. The spectral position and shape of this spectrum depend on the detuning of the dimer's one-exciton resonance relative to the plasmon resonance and the ratio of the exciton-plasmon coupling constant to the exciton dephasing rate. When the applied field intensity to the nonlinear regime is increased, the Fano-like singularities in the absorption spectra are smeared and they disappear due to saturation of the dimer, which leads to the MNP dominating the spectrum. The above effects, for which we provide physical explanations, allow one to tailor the Fano-like shape of the absorption spectrum, by changing either the detuning or the input power.

show abstract

The inhibition of optical excitations and enhancement of Rabi flopping in hybrid quantum dot–metallic nanoparticle systems

Cited by 99 publications

References 26 publications

Resonance fluorescence spectrum of ap-doped quantum dot coupled to a metallic nanoparticle

Resonance fluorescence spectrum of ap-doped quantum dot coupled to a metallic nanoparticle

Plasmonic effects in excitonic population transfer in a driven semiconductor–metal nanoparticle hybrid system

Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle

Contact Info

Product

Resources

About