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Article
Polariton condensate coherence in planar microcavities in a magnetic field
In planar GaAs microcavities in a magnetic field up to 5 T perpendicular to the structure growth plane, under conditions of resonant pulsed pum** to a point close to the inflection point of the lower dispers...
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Article
Dynamics of spatial coherence and momentum distribution of polaritons in a semiconductor microcavity under conditions of Bose-Einstein condensation
The dynamics of spatial coherence and momentum distribution of polaritons in the regime of Bose-Einstein condensation in a GaAs microcavity with embedded quantum wells under nonresonant excitation with picosec...
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Article
Open AccessMicrocavity controlled coupling of excitonic qubits
Controlled non-local energy and coherence transfer enables light harvesting in photosynthesis and non-local logical operations in quantum computing. This process is intuitively pictured by a pair of mechanical...
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Article
Laser mode feeding by shaking quantum dots in a planar microcavity
Semiconductor light emission can be changed considerably in an optical resonator1. Prerequisite is that the electronic transitions involved in light generation are in resonance with a cavity mode. Although resona...
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Article
Above GaSb barrier in type II quantum well structures for mid-infrared emission detected by Fourier-transformed modulated reflectivity
Modulation spectroscopy in its Fourier-transformed mode has been employed to investigate the optical properties of broken gap ‘W’-shaped GaSb/AlSb/InAs/InGaSb/InAs/AlSb/GaSb quantum well structures designed to...
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Article
Photoluminescence and Infrared Absorption Study of Isoelectronic Impurity Passivation by Hydrogen
The effects of H irradiation and thermal annealing on the optical properties of (InGa)(AsN) heterostructures have been investigated by photoluminescence (PL) and infrared absorption, as well as by theoretical ...
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Article
Bose-einstein condensation of exciton polaritons in high-Q planar microcavities with GaAs quantum wells
Condensation of exciton polaritons in planar microcavities with GaAs/AlAs quantum wells in the active area has been studied. It has been found that an increase in the lifetime of polaritons up to ∼10–15 ps whe...
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Article
Mid infrared interband cascade lasers for sensing applications
The growth of Interband Cascade Laser material to cover the wavelength range from 3–4 μm is presented along with the fabrication and characterization of Broad Area (BA) and Ridge Waveguide (RWG) devices based ...
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Article
Up on the Jaynes–Cummings ladder of a quantum-dot/microcavity system
The strong coupling of light and matter is responsible for phenomena such as Bose–Einstein condensation. In a study of strong-coupling effects in semiconductor microcavities, the interaction between a two-leve...
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Article
Non-resonant dot–cavity coupling and its potential for resonant single-quantum-dot spectroscopy
Non-resonant emitter–cavity coupling is a fascinating effect recently observed as unexpected pronounced cavity resonance emission even in strongly detuned single quantum dot–microcavity systems1,2,3. This phenome...
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Article
Direct observation of correlations between individual photon emission events of a microcavity laser
Coherent light emission in lasers is reflected in a change of the photon statistics. Here Wiersig et al. demonstrate a streak camera technique with sufficient time resolution to probe the dynamical evolution of c...
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Article
Observation of Bogoliubov excitations in exciton-polariton condensates
The observation of so-called Bogoliubov excitations provides the first sign of possible superfluid behaviour in an exciton-polariton condensate.
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Article
Excitons in artificial quantum dots in the weak spatial confinement regime
The exciton states in individual quantum dots prepared by the selective interdiffusion method in CdTe/CdMgTe quantum wells are studied by the methods of steady-state optical spectroscopy. The annealing-induced...
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Article
Production of quantum dots by selective interdiffusion in CdTe/CdMgTe quantum wells
Individual quantum dots are produced by selective interdiffusion between the barriers and the quantum well layer in a CdTe/CdMgTe heterostructure. The heterostructure, with a SiO2 mask preliminarily deposited ont...
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Article
Magnetooptics and dynamics of a magnetic polaron in semimagnetic CdSe/ZnMnSe quantum dots
The magnetooptics and picosecond dynamics of the radiative recombination of excitons in self-assembled semimagnetic CdSe/ZnMnSe quantum dots is studied at low temperatures. The behavior of individual quantum d...
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Article
Interference effects in the emission spectra of quantum dots in high-quality cavities
We have investigated theoretically and experimentally the emission of (quantum dot-cavity) systems for different coupling strength and a wide range of exciton-photon mode detunings controlled by temperature va...
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Article
Exciton states in strongly coupled asymmetric semimagnetic double quantum dots
Exciton states in a pair of strongly coupled artificial asymmetric quantum dots (QDs) have been studied in magnetic fields up to B = 8T by means of photoluminescence spectroscopy. The QD molecules have been fabri...
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Article
Strong coupling in a single quantum dot–semiconductor microcavity system
Cavity quantum electrodynamics, a central research field in optics and solid-state physics1,2,3, addresses properties of atom-like emitters in cavities and can be divided into a weak and a strong coupling regime....
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Article
Wavelength switching by mode interference of coupled cavities with photonic crystal reflectors
We report the development of current-controlled widely tunable laser diodes based on InP with photonic crystal reflectors. The lasers consist of two longitudinally coupled and individually contacted segments t...
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Article
Photoreflectance study of hydrogenated (InGa)(AsN)/GaAs heterostructures
We report on photoreflectance measurements performed in the 0.8–1.6 eV photon energy range in as grown and hydrogenated InxGa1-xAs1-yNy/GaAs single quantum wells grown on GaAs substrates by molecular beam epitaxy...
