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We establish a technology which allows for deep and tunable polariton trapping. Pronounced band structures with full gaps and condensation at high symmetry points is observed in square lattice arrangements of evanescently coupled potential traps.
Exciton-polariton lasers are operated in the strong light matter coupling regime. They promise low threshold operation since population inversion is not inherently necessary. Hence they are of great interest for next generation coherent light sources.
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...
Several theoretical studies have recently suggested that the scattering of microcavity polaritons can be a source of non-classical photon correlations, producing photon pairs that are entangled in either the energy (branch index) [1], or the polarization degree of freedom [2]. Even cluster states can be generated [3]. Motivated by the above-mentioned proposals for the creation of entangled photon...
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 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.
Exciton-polariton laser diodes are realized by integrating four InGaAs quantum wells in high quality factor doped distributed Bragg reflector microcavities. Efficient current injection into the active region allow to preserve the strong coupling regime between excitons and photons across the threshold of polariton lasing.
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 35 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...
Recent progress in the field of electrically pumped single photon sources based on quantum dotmicrocavity systems will be reviewed. We demonstrate efficient single photon emission at rates exceeding 40 MHz from electrically pumped micropillar cavities.
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.
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.
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.
We report on electrically driven quantum dot micropillar cavities with quality factors (Q-factors) up to 16.000. A special lateral current injection scheme into small mode volume micropillars is employed which ensures an efficient light outcoupling. The high Q-factors allow the observation of pronounced single dot resonance effects with a Purcell enhancement. These features make the novel electrically...
We report on high quality electrically driven quantum dot micropillar cavities with Q-factors up to 16.000. The high Q-factors allow the observation of pronounced single dot resonance effects with a Purcell enhancement of about 10.
Engineering the interaction of light with matter allows one to tune important properties of solids like e.g. the spontaneous emission rate or the spontaneous emission coupling factor into a laser mode. We have investigated light matter interaction effects in semiconductors using (QD) micropillar cavities and micro disks containing dots with strongly varying oscillator strength and different Q-factors...
High quality semiconductor microcavities have attracted considerable attention as a compact solid state platform for the investigation of light-matter interaction between photons and excitons in single quantum dots. Owing to a combined optimization of the design (increased number of mirror pairs), the growth conditions (V/III ratio) and the dry etching process we were able to achieve record quality...
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