Enhanced light emission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">In</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">As</mml:mi></mml:math>quantum dots in a two-dimensional photon

Happ, T.; Tartakovskii, I. I.; Kulakovskiĭ, V. D.; Reithmaier, J.P.; Kamp, M.; Forchel, A.

doi:10.1103/physrevb.66.041303

Cited by 110 publications

(49 citation statements)

References 19 publications

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“…4. This method has been proposed as a substitute for the time-resolved measurements, and has been widely used for micropillars 20 , microdiscs 20 and photonic crystals 27 . The analytic expressions can be found by determining the pump rate corresponding to the maximum intensity of equation 3.…”

Section: A Saturation Pump Rate Measurementsmentioning

confidence: 99%

Continuous-wave versus time-resolved measurements of Purcell factors for quantum dots in semiconductor microcavities

et al. 2009

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The light emission rate of a single quantum dot can be drastically enhanced by embedding it in a resonant semiconductor microcavity. This phenomenon is known as the Purcell effect, and the coupling strength between emitter and cavity can be quantified by the Purcell factor. The most natural way for probing the Purcell effect is a time-resolved measurement. However, this approach is not always the most convenient one, and alternative approaches based on a continuouswave measurement are often more appropriate. Various signatures of the Purcell effect can indeed be observed using continuous-wave measurements (increase of the pump rate needed to saturate the quantum dot emission, enhancement of its emission rate at saturation, change of its radiation pattern), signatures which are encountered when a quantum dot is put on-resonance with the cavity mode. All these observations potentially allow one to estimate the Purcell factor. In this paper, we carry out these different types of measurements for a single quantum dot in a pillar microcavity and we compare their reliability. We include in the data analysis the presence of independent, nonresonant emitters in the microcavity environment, which are responsible for a part of the observed fluorescence.

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Section: A Saturation Pump Rate Measurementsmentioning

confidence: 99%

Continuous-wave versus time-resolved measurements of Purcell factors for quantum dots in semiconductor microcavities

et al. 2009

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“…27 In order to account for the difference of the integrated intensities due to different extraction efficiencies, the intensity of QDA2 is normalized to have the same intensity as the QDA1 in the linear regime ͑low excitation intensity͒. 28 In Fig. 5͑a͒, when the two QDA are both off resonance ͑at T =33 K͒, the same dependence is observed.…”

Section: 12mentioning

confidence: 99%

Control of the spontaneous emission from a single quantum dash using a slow-light mode in a two-dimensional photonic crystal on a Bragg reflector

et al. 2009

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“…More strongly coupled QDs within the cavity peak are then able to emit many more photons per unit time, making the cavity peak stand out clearly. 7,11 The PL is collected by the same objective in reflection geometry, dispersed in wavelength by a spectrometer, and detected by an InGaAs linear array. The sample is mounted in a Cryovac ͑Germany͒ Konti-Mikro cryostat with temperature control from 325 to 3.5 K, by adjusting the He flow and/or the internal heater.…”

mentioning

confidence: 99%

Scanning a photonic crystal slab nanocavity by condensation of xenon

Mosor

Hendrickson

Richards

et al. 2005

Applied Physics Letters

203

166

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Allowing xenon or nitrogen gas to condense onto a photonic crystal slab nanocavity maintained at 10-20 K results in shifts of the nanocavity mode wavelength by as much as 5 nm ͑Х4 meV͒. This occurs in spite of the fact that the mode defect is achieved by omitting three holes to form the spacer. This technique should be useful in changing the detuning between a single quantum dot transition and the nanocavity mode for cavity quantum electrodynamics experiments, such as mapping out a strong coupling anticrossing curve. Compared with temperature scanning, it has a much larger scan range and avoids phonon broadening. © 2005 American Institute of Physics. ͓DOI: 10.1063/1.2076435͔Radiative coupling between a single quantum dot ͑SQD͒ and a small volume cavity alters the emission properties of the coupled system. In the weak coupling regime, the spontaneous emission has a single emission frequency, and it irreversibly escapes from the cavity. The SQD radiative emission rate is enhanced by the Purcell factor F P =3 3 Q / ͑4 2 V͒ compared with the cavityless radiative emission rate ␥ 0 ; Q and V are the quality factor and volume of the cavity, respectively, and = 0 / n is the wavelength of the light in the material with refractive index n. The several single-photon-on-demand sources that have been reported operate in the weak coupling regime. [1][2][3][4][5] In the strong coupling regime, the Rabi frequency rate of exchange of the excitation between the SQD and the cavity, g = E vac / ប, exceeds both the photon escape rate and SQD dephasing rate ␥. In the formula for g, it is assumed that the SQD has dipole moment and is in the peak of the root-mean-square intracavity field E vac satisfying 0 n 2 ͉E vac ͉ 2 V = h /2; 0 is the permittivity of vacuum, and is the frequency of the cavity mode. The strong coupling makes the spontaneous emission reversible, i.e., a photon emitted by the excited SQD has a higher probability of being reabsorbed than escaping the cavity. For zero detuning between the SQD and the cavity mode, the coupled-system spontaneous emission can occur at either of two frequencies separated by 2g. If the coupled transition of the SQD is between excited state ͉e͘ and ground state ͉g͘ and the quantized field state with n photons in the cavity mode is denoted by ͉n͘, then the two coupled-system eigenstates can be written as ͉e0͘ ± ͉g1͘. Since neither eigenstate can be written as a product of a quantum dot ͑QD͒ state and a cavity state, each has entanglement-a basic ingredient of quantum information science. Recently, there have been three experimental claims of observing this vacuum Rabi splitting using for the nanocavity a micropillar, 6 a photonic crystal slab, 7 and a microdisk. 8 The photonic crystal slab nanocavity has the smallest mode volume, ͑0.3-1͒ 3 . Therefore, it will have the largest vacuum Rabi splitting 2g for a given SQD dipole moment, since E vac ϰ 1/ ͱ V.For many years, of a photonic crystal nanocavity has been larger than ␥; therefore, since =2 / Q, it has been g / ϰ Q / ͱ V that needed to be ...

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Enhanced light emission ofInxGa1−xAsquantum dots in a two-dimensional photon

Cited by 110 publications

References 19 publications

Continuous-wave versus time-resolved measurements of Purcell factors for quantum dots in semiconductor microcavities

Continuous-wave versus time-resolved measurements of Purcell factors for quantum dots in semiconductor microcavities

Control of the spontaneous emission from a single quantum dash using a slow-light mode in a two-dimensional photonic crystal on a Bragg reflector

Scanning a photonic crystal slab nanocavity by condensation of xenon

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