Optical microcavities

Vahala, Kerry J.

doi:10.1038/nature01939

Cited by 4,624 publications

(3,212 citation statements)

References 112 publications

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“…Efficient devices require the quantum dot to be placed in a single mode, high finesse, small volume microcavity [16,17]. The cavity serves to modify the photon emission dynamics [18] enhancing device efficiency [17,19,20], as well as directing the emission from the dot for efficient coupling to an external optical system.…”

Section: Introductionmentioning

confidence: 99%

Directed self‐assembly of single quantum dots for telecommunication wavelength optical devices

Dalacu¹,

Reimer

Frédérick

et al. 2010

Laser & Photonics Reviews

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Strong confinement of charges in few electron systems such as in atoms, molecules and quantum dots leads to a spectrum of discrete energy levels that are often shared by several degenerate quantum states. Since the electronic structure is key to understanding their chemical properties, methods that probe these energy levels in situ are important. We show how electrostatic force detection using atomic force microscopy reveals the electronic structure of individual and coupled self-assembled quantum dots. An electron addition spectrum in the Coulomb blockade regime, resulting from a change in cantilever resonance frequency and dissipation during tunneling events, shows one by one electron charging of a dot. The spectra show clear level degeneracies in isolated quantum dots, supported by the first observation of predicted temperature-dependent shifts of Coulomb blockade peaks. Further, by scanning the surface we observe that several quantum dots may reside on what topologically appears to be just one. These images of grouped weakly and strongly coupled dots allow us to estimate their relative coupling strengths.

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Section: Introductionmentioning

confidence: 99%

Directed self‐assembly of single quantum dots for telecommunication wavelength optical devices

Dalacu¹,

Reimer

Frédérick

et al. 2010

Laser & Photonics Reviews

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“…1 Liquid microdroplets are attractive systems for such studies because of their easily deformable nature. We have previously demonstrated the spectral tuning of water microdroplets standing on a superhydrophobic surface by controlling the evaporation/condensation kinetics in a humidity chamber.…”

Section: Introductionmentioning

confidence: 99%

Large spectral tuning of a water–glycerol microdroplet by a focused laser: characterization and modeling

Kiraz

Karadağ

Muradoğlu

2008

Phys. Chem. Chem. Phys.

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Large spectral tuning of a water-glycerol microdroplet standing on a superhydrophobic surface by local heating with a focused infrared laser is studied both experimentally by optical spectroscopy and computationally using a lumped system formulation of the mass and heat transfer between the microdroplet and the chamber. The effects of optical scattering force, chamber humidity, size of microdroplet and laser power on the tuning mechanism are examined. The reversibility of the tuning mechanism is also studied. In spite of its negligibly small volatility compared to that of water, irreversibility is found to be mainly caused by evaporation of glycerol. It is also found that reversibility increases dramatically with the relative water and glycerol humidities, and spectral tuning can be made almost fully reversible when the chamber is saturated with glycerol vapor and the relative water humidity approaches unity. Some hysteresis effects are observed, especially in large microdroplets, and this behavior is attributed to the whisperinggallery mode resonances in laser absorption. The time response of the tuning mechanism is also analyzed both experimentally and computationally. The technique presented can find applications in optical communication systems, and can be used in fundamental studies in cavity quantum electrodynamics and in characterizing liquid aerosols on a surface.

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“…When Q/V ef f is high enough, strong coupling regime occurs with reversible energy exchange between the emitter and the cavity mode (Rabi oscillations) [2]. The design of cavities maximizing this ratio in order to control spontaneous emission is extremelly challenging.…”

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confidence: 99%

Purcell factor for a point-like dipolar emitter coupled to a two-dimensional plasmonic waveguide

et al. 2011

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We theoretically investigate the spontaneous emission of a point-like dipolar emitter located near a two-dimensional (2D) plasmonic waveguide of arbitrary form. We invoke an explicite link with the density of modes of the waveguide describing the electromagnetic channels into which the emitter can couple. We obtain a closed form expression for the coupling to propagative plasmon, extending thus the Purcell factor to plasmonic configurations. Radiative and non-radiative contributions to the spontaneous emission are also discussed in details.

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Optical microcavities

Cited by 4,624 publications

References 112 publications

Directed self‐assembly of single quantum dots for telecommunication wavelength optical devices

Directed self‐assembly of single quantum dots for telecommunication wavelength optical devices

Large spectral tuning of a water–glycerol microdroplet by a focused laser: characterization and modeling

Purcell factor for a point-like dipolar emitter coupled to a two-dimensional plasmonic waveguide

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