Subnanosecond spectral diffusion measurement using photon correlation

Sallen, Gregory; Tribu, Adrien; Aichele, Thomas; André, R.; Besombes, L.; Bougerol, Catherine; Richard, M A; Tatarenko, S.; Kheng, K.; Poizat, Jean‐Philippe

doi:10.1038/nphoton.2010.174

Cited by 139 publications

(145 citation statements)

References 19 publications

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“…29 A similar increase can in principle be produced also by refilling the dot from the cavity. This mechanism is compatible with the metastable state model, as it would mainly affect the effective pumping rate G. Spectral diffusion has been recently reported 33 as a bunching mechanism in CdSe QDs. In our case, we do not believe this mechanism to be crucial to our results, as the present PL width (about 150 μeV) is one order of magnitude smaller than the one reported for CdSe QDs 34 and therefore indicates a much weaker spectral diffusion.…”

Section: -3supporting

confidence: 84%

Controlling the properties of single photon emitters via the Purcell effect

et al. 2012

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Single photon emission by an InAs/GaAs quantum dot weakly coupled to a photonic crystal microcavity has been studied as a function of energy detuning. Precise and continuous control of the photon statistics as well as of the linear polarization emission angle is achieved simply by changing the energy detuning between the exciton and the cavity mode. A continuous decrease of the antibunching time, the bunching amplitude and the g 2 (0) value is observed as the detuning is decreased at constant excitation rate, due to the detuning-dependent Purcell effect.

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Section: -3supporting

confidence: 84%

Controlling the properties of single photon emitters via the Purcell effect

et al. 2012

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“…Such a behavior may be reminiscent of the one observed on the non-resonant photoluminescence in QDs and nanocrystals. Although slow bunching effects were observed, they arose from the so-called spectral diffusion effect [13,49,[51][52][53]. In our case, the QD charge state fluctuations is the main reason for photon bunching [54,55] and we observe a blinking between distinct excitonic states, namely the neutral exciton and the other excitonic complexes.…”

Section: Photon Statistics Of the Resonant Emissionmentioning

confidence: 49%

Photoneutralization and slow capture of carriers in quantum dots probed by resonant excitation spectroscopy

et al. 2013

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We investigate experimentally and theoretically the resonant emission of single InAs/GaAs quantum dots in a planar microcavity. Due to the presence of at least one residual charge in the quantum dots, the resonant excitation of the neutral exciton is blocked. The influence of the residual doping on the initial quantum dots charge state is analyzed, and the resonant emission quenching is interpreted as a Coulomb blockade effect. The use of an additional non-resonant laser in a specific low power regime leads to the carrier draining in quantum dots and allows an efficient optical gating of the exciton resonant emission. A detailed population evolution model, developed to describe the carrier draining and the optical gate effect, perfectly fits the experimental results in the steady state and dynamical regimes of the optical gate with a single set of parameters. We deduce that ultra-slow Auger-and phonon-assisted capture processes govern the carrier draining in quantum dots with relaxation times in the 1 -100 µs range. We conclude that the optical gate acts as a very sensitive probe of the quantum dots population relaxation in an unprecedented slow-capture regime.

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“…ARTICLE equalize R1 and R2*, proving the existence of a phonon-limited hybrid-XX cascade including a transition from the dark to the bright X states. The apparent temporally broad (E ± 25 ns) bunching phenomenon in both correlation functions arises from spectral diffusion 44,45 and is modelled as described by Sallen et al 55 . Further standard techniques for the identification of QD emission lines are discussed in Supplementary Note 2.…”

Section: Resultsmentioning

confidence: 99%

Manifestation of unconventional biexciton states in quantum dots

et al. 2014

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Although semiconductor excitons consist of a fermionic subsystem (electron and hole), they carry an integer net spin similar to Cooper-electron-pairs. While the latter cause superconductivity by forming a Bose-Einstein-condensate, excitonic condensation is impeded by, for example, a fast radiative decay of the electron-hole pairs. Here, we investigate the behaviour of two electron-hole pairs in a quantum dot with wurtzite crystal structure evoking a charge carrier separation on the basis of large spontaneous and piezoelectric polarizations, thus reducing carrier overlap and consequently decay probabilities. As a direct consequence, we find a hybrid-biexciton complex with a water molecule-like charge distribution enabling anomalous spin configurations. In contrast to the conventional-biexciton complex with a net spin of s ¼ 0, the hybrid-biexciton exhibits s ¼ ± 3, leading to completely different photoluminescence signatures in addition to drastically enhanced charge carrier-binding energies. Consequently, the biexcitonic cascade via the dark exciton can be enhanced on the rise of temperature as approved by photon cross-correlation measurements.

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Subnanosecond spectral diffusion measurement using photon correlation

Cited by 139 publications

References 19 publications

Controlling the properties of single photon emitters via the Purcell effect

Controlling the properties of single photon emitters via the Purcell effect

Photoneutralization and slow capture of carriers in quantum dots probed by resonant excitation spectroscopy

Manifestation of unconventional biexciton states in quantum dots

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