Pressure-induced electronic coupling of self-organized quantum dots by a near-field optical probe

Summary form only given. Because of their small nanometer size and strong electronic confinement, quantum dots exhibit zero-dimensional electronic and optical effects which continue to be interesting for physics and promising for applications. To study single and clusters of self-organized semiconductor quantum dots, near-field optical nanoprobing is a powerful tool. Its spatial resolution surpasses the diffraction limit of light and enables the detailed spectroscopy of single dots within high density dot ensembles. We use a new feature of optical nanoprobing pressure-induced strain modulation near the surface to study electronic coupling effects in neighboring quantum dots.