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 report on a theoretical and experimental study performed on AlAs/GaAs micropillar cavities containing InGaAs quantum dots as active medium. The devices have the interesting property of having almost all emission (spontaneous and stimulated) channelled into one cavity mode. They are excellent experimental platforms for studying laser physics because their emission behaviours question our understanding...
Quantum dots (QDs) can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information devices [1]. In this limit, a single photon input into the device will undergo a large rotation of the polarization of the light field due to the...
We report the measurement of macroscopic phase shifts of several degrees for reflected incident light resonant with a bright negatively charged quantum dot (QD) in a micropillar structure of Q-factor less than 200.
We demonstrate the emission of highly indistinguishable photons from a quasi-resonantly pumped coupled quantum dot-microcavity system operating in the weak coupling regime. Furthermore we model the degree of indistinguishability with our novel microscopic theory.
We have developed an optical switch with a quantum dot in a high Q-factor microcavity. Experimental reflectivity spectroscopy fitted by a semi-analytical model estimates the intracavity photon number required to switch the device as 0.13.
The prospect of studying quantum optics in the solid state and the quest for quantum light sources in the field of quantum communication has triggered enormous efforts in the development of microcavity systems with embedded quantum dots (QDs) [1]. The success story in this field of modern optics includes the observation of fundamental light-matter interaction in the cavity quantum electrodynamics...
A novel concept for on-chip quantum optics using an internal electrically pumped microlaser is presented. The microlaser resonantly excites a quantum dot — microcavity system operating in the weak coupling regime of cavity quantum electrodynamics.
Adiabatic design submicron diameter quantum-dot micropillars have been designed and implemented for cavity quantum electrodynamics experiments. Ultra-high experimental quality factors (>10,000) are obtained for submicron diameters and strong light-matter interaction is observed.
We report on cavity quantum electrodynamics studies in optically and electrically pumped quantum dot micropillar systems. Light-matter interaction effects in the quantum limit and possible applications in efficient light sources will be discussed.
We report on high efficient electrically pumped quantum dot-micropillar single photon sources. The triggered sources show record high efficiency (34%) and single photon emission rates of up to 47 MHz under pulsed electrical excitation.
Controlling the position of individual quantum dots (QDs) by means of overgrowing a prepatterned substrate is a prospering research topic. In combination with an accurate alignment procedure, single site-controlled quantum dots (SCQDs) can be precisely retrieved after overgrowth and even integrated in optical resonator devices. This is an essential step towards the parallel fabrication of spatial...
The investigation of quantum electrodynamics effects such as weak and strong coupling in quantum dot- micropillar systems in electrically contacted devices has recently become possible due to advances in nano- processing. This is of high interest for practical applications, e.g. the realization of compact single photon sources. Moreover, compared to simple optically excited structures electrically...
We report on cavity quantum electrodynamics effects in high-Q electrically contacted quantum dot-micropillar cavities. The structures show weak coupling and strong coupling via electrooptical tuning as well as single photon emission and low threshold lasing.
Heterodyne spectral interferometry is employed to perform four-wave mixing spectroscopy on a strongly-coupled system of an exciton confined in a single quantum dot and a photon mode of a pillar microcavity. The coherent dynamics of one and two photon states are directly observed and the validity of the Jaynes-Cummings model is tested.
Semiconductor cavity quantum electrodynamics (cQED) effects in electrically addressed micropillar cavities are studied. Both strong and weak coupling could be achieved either by electro-optic tuning or electrical excitation, respectively.
We report on a scalable process to incorporate InAs quantum dots in spatially resonant devices. This process combines site controlled quantum dot growth with an accurate alignment of the device to the single QDs.
The talk discusses quantum dot micropillar cavities with electrical injection and quality factors in excess of 10.000. Weak and strong coupling effects and lasing are investigated. Challenges and the potential for device applications are discussed.
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.