The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We investigate the rates of charge state fluctuation in single InGaAs quantum dots under resonant excitation and with an additional low-power above-band laser. Multiple charging processes are identified.
We show that the presence of a single photon deterministically controls the transmission of another photon. Their strong interactions are mediated by a single quantum dot spin that is strongly coupled to a nanophotonic cavity.
Interference between coherent scattering from the two fine structure split exciton states in a neutral InGaAs quantum dot causes an unconventional excitation line shape. Analysis allows the extraction of steady-state coherence between the exciton states.
Resonant photoluminescence excitation spectra and autocorrelation measurements indicate that a quantum dot experiences discrete spectral shifts and continuous drifts due to fluctuations in the local charge environment. Specifically, the fluctuations of few nearby charge traps.
We realize a nanophotonic quantum interface for a quantum dot spin by strongly coupling the quantum dot to a nanophotonic cavity. This interface enables a spin-photon quantum phase switch, and also allows optical spin readout.
We demonstrate single-photon-level phase preservation in an up-converting interferometer. The up-conversion process is background-free to within experimental uncertainty, allowing high fringe contrast even at low photon levels. This enables faithful up-conversion of entangled photon pairs.
We demonstrate topological defect lasers in a GaAs membrane with embedded InAs quantum dots. By introducing a disclination to a square-lattice of elliptical air holes, we obtain spatially confined lasing modes that support powerflow vortices.
We experimentally demonstrate reversible strain-tuning of a quantum dot strongly coupled to a photonic crystal cavity. We observe a clear anti-crossing between the quantum dot and the cavity using the strain tuning technique.
We demonstrate a method to control the coupling interaction in a coupled-cavity photonic crystal molecule by using a local and reversible photochromic tuning technique. This method is promising for development of integrated photonic devices with large number of cavities.
We demonstrate experimentally that by optimizing the spatial pump profile we can select different modes to lase in a semiconductor microdisk cavity, and suppress lasing in all other modes by increasing their thresholds.
Quantum non-classicality is not only a fundamental feature which shows the solely quantum character of an emitted photon, but is also necessary for modern applications based on the quantum character of light like quantum information processing [1]. The usual way to show that a light source is non-classical is to measure its auto-correlation [2]. In our work instead we used a different criterion developed...
We discuss two-time correlation experimental measurement of statistical properties of non-classical light from a single InAs quantum dot. We present a model that describes properties of a quantum dot excitation via carrier reservoirs.
We observed singly-resonant, 4-quasi-phasematched, second-harmonic generation in a GaAs microdisk cavity. By pumping at the 1985.4-nm fundamental resonance, we observed (5.2±0.4)×10−5/mW conversion efficiency.
We systematically studied the lasing characteristics in photonic polycrystalline and amorphous structures under optical pumping. The lasing modes are spatially localized, and blue shift as the structural order becomes short ranged.
We demonstrate a new method to characterize nonclassical states that measures the temporal dependence of their statistical and coherent properties. We extract information about underlying physical processes in an InAs quantum dot in situ.
We demonstrated lasing in two-dimensional Thue-Morse structures fabricated in InAs quantum dots embedded GaAs membrane. We optimized structural aperiodicity by gradually changing the relative size of two scatters for the strongest light confinement.
We experimentally realize a photonic crystal microcavity-quantum dot system where a quantum dot is simultaneously coupled to evanescently coupled optical cavities with modes spectrally separated by 2.4 nm.
We show that integrating waveguides in photonic crystal cavities coupled to quantum dots leads to highly efficient optical nonlinear effects at low photon numbers. Semiconductor quantum dots coupled to photonic crystal cavities provide a platform where large optical nonlinearities can be observed near the single photon level [1,2]. Coupling photonic crystal cavities to a waveguide allows for efficient...
We theoretically describe ̄4-quasi-phasematched second-harmonic generation in a GaAs microdisk for the cases when waves are on- or off-resonance with the cavity. 1.2%/mW conversion efficiency can be obtained when both waves are on-resonance.
We interface single photons generated by a quantum dot with those generated via parametric down-conversion. The photon indistinguishability is assessed by measuring their coalescence probability; it is 16% and limited by quantum dot decoherence.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.