Nanoscale Imaging with a Single Quantum Dot

Ropp, Chad; Cummins, Zachary; Nah, Sanghee; Fourkas, John T.; Shapiro, Benjamin; Waks, Edo

doi:10.21236/ada581052

Cited by 14 publications

(24 citation statements)

References 14 publications

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“…4,5 The Lanthanide-doped upconverting nanoparticles (UCNPs) demonstrate significant advantages over other traditionally used multiphoton excited probes (Semiconductor Quantum Dots and Gold nanoparticles), such as the possibility of performing multiphoton fluorescence imaging experiments with costeffective continuous wave laser sources instead of expensive mode locked femtosecond lasers. 6,7 In addition, the absence of "on-off" blinking in the luminescent signal made possible the use of UCNPs for single-molecule detection under near infrared (NIR) multiphoton excitation with light intensity requirements similar to those typically used for standard one-photon confocal imaging. 8,9 Moreover, the use of NIR excitation also minimizes photodamage in biological tissues and cells and reduces the background contribution of autofluorescence.…”

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confidence: 99%

Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

et al. 2015

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in: trapping with a single infrared laser beam. Contrary to expectations, the single UCNP emission differs from that generated by an assembly of UCNPs. The experimental data reveal that the differences can be explained in terms of modulations caused by radiationtrapping, a phenomenon not considered before but this work reveals to be of great relevance.

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confidence: 99%

Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

et al. 2015

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“…For instance, metal nanowires does not present a cut-off and the lateral mode confinement is not diffraction limited but given by the nanowire cross-section [123]. Therefore, we expect high coupling efficiency of a dipolar emitter to a metal nanowire [124,125,126,127,128,129,130]. Metal nanowires define 1D plasmonic waveguides with a great potential for integrated optical routing [131].…”

Section: Purcell Factor Near a Plasmonic Waveguidementioning

confidence: 99%

Plasmonic Purcell factor and coupling efficiency to surface plasmons. Implications for addressing and controlling optical nanosources

Francs

Barthès

Bouhélier

et al. 2016

J. Opt.

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Abstract. The Purcell factor Fp is a key quantity in cavity quantum electrodynamics (cQED) that quantifies the coupling rate between a dipolar emitter and a cavity mode. Its simple form Fp ∝ Q/V unravels the possible strategies to enhance and control light-matter interaction. Practically, efficient light-matter interaction is achieved thanks to either i) high quality factor Q at the basis of cQED or ii) low modal volume V at the basis of nanophotonics and plasmonics. In the last decade, strong efforts have been done to derive a plasmonic Purcell factor in order to transpose cQED concepts to the nanocale, in a scale-law approach. In this work, we discuss the plasmonic Purcell factor for both delocalized (SPP) and localized (LSP) surface-plasmon-polaritons and briefly summarize the expected applications for nanophotonics. On the basis of the SPP resonance shape (Lorentzian or Fano profile), we derive closed form expression for the coupling rate to delocalized plasmons. The quality factor factor and modal confinement of both SPP and LSP are quantified, demonstrating their strongly subwavelength behaviour.

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“…SEs and DEs are obtained as , (16) where the electron creation and annihilation operators, and , generate and destroy an electron in the l th and m th adiabatic KS orbitals, respectively. The time-evolving wave function is then expressed by (17) Analogous to Eq.…”

Section: Time-domain Density Functional Theory For Auger Processesmentioning

confidence: 99%

“…The unique physical and chemical properties [1][2][3][4] of semiconducting and metallic nanocrystals form the basis for a variety of applications, ranging from optical sensors [5,6] and probes [7,8], to photovoltaic [9,10], optical [11], electronic [12], optoelectronic [13], and spintronic [14] devices, and to light-emitting [15] and imaging [16] technologies. The excited state dynamics in semiconducting [17] and metallic [18] QDs are very intricate [19].…”

Section: Introductionmentioning

confidence: 99%

Time-domain ab initio modeling of excitation dynamics in quantum dots

Neukirch¹,

Hyeon‐Deuk²,

Prezhdo³

2014

Coordination Chemistry Reviews

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The review discusses the results of ab initio time-dependent density functional theory and nonadiabatic molecular dynamics simulations of photoinduced dynamics of charges, excitons, plasmons, and phonons in semiconductor and metallic quantum dots (QD). The simulations create an explicit timedomain representation of the excited-state processes, including elastic and inelastic electron-phonon scattering, multiple exciton generation, fission, and recombination. These nonequilibrium phenomena control the optical and electronic properties of QDs. Our approach can account for QD size and shape, as well as chemical details of QD structure, such as dopants, defects, core/shell regions, surface ligands, and unsaturated bonds. Each of these variations significantly alters the properties of photoexcited QDs.The insights reported in this review provide a comprehensive understanding of the excited-state dynamics in QDs and suggest new ways of controlling the photo-induced processes. The design principles that follow, guide development of photovoltaic cells, electronic and spintronic devices, biological labels, and other systems rooted in the unique physical and chemical properties of nanoscale materials.

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Nanoscale Imaging with a Single Quantum Dot

Cited by 14 publications

References 14 publications

Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

Plasmonic Purcell factor and coupling efficiency to surface plasmons. Implications for addressing and controlling optical nanosources

Time-domain ab initio modeling of excitation dynamics in quantum dots

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