Optically-induced magnetization of CdMnTe self-assembled quantum dots

Optically induced charging effects in self-assembled GaSb/GaAs quantum dots

We report photoluminescence (PL) measurements on self-assembled GaSb/GaAs quantum dots. As the laser excitation is increased from very low levels, the PL shows a strong red shift, and then a blue shift, such that it presents a U-shaped curve. Raising the temperature causes a large s,100 meVd blue shift of the PL, and shifts the minimum of the PL energy versus laser excitation curve to higher la...

Light-induced spectral diffusion in single self-assembled quantum dots

Small ensembles of In0.55Al0.45As self-assembled quantum dots have been studied at low temperatures using near-field scanning optical microscopy. We observe spectral diffusion in individual quantum dot luminescence lines. The phenomenon increases in magnitude with optical power density, but is not visible at low powers. We believe the spectral diffusion to be caused by long time-scale trapping ...

Nanophotonic Waveguides by Self-Assembled Quantum Dots

In order to construct ultra-high density photonic integrated circuits, innovative techniques are required to circumvent the fundamental restriction set by Heisenberg’s Uncertainty Principle and the resulting diffraction limit. Traditionally, waveguides adhere to a lower bound in size roughly equal to the propagating wavelength to allow for energy confinement and minimal crosstalk. However, prog...

Self-assembled Nanorings and Stressor Quantum Dots

Kondo excitons in self-assembled quantum dots

A. O. Govorov, K. Karrai, and R. J. Warburton Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA Institute of Semiconductor Physics, 630090 Novosibirsk, Russia Center for NanoScience and Sektion Physik, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany Department of Physics, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom ~R...