Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 70: Semiconductor Lasers I
HL 70.6: Vortrag
Donnerstag, 10. März 2016, 10:45–11:00, H13
Two color excitation of a single-QD Laser in the strong coupling regime — •Fabian Gericke1, Martin von Helversen1, Maximilian Sommer1, Tobias Heindel1, Christian Schneider2, Frank Jahnke3, Sven Höfling2, Janik Wolters1, Martin Kamp2, Christopher Gies3, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany — 2Technische Physik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 3Institut für Theoretische Physik, Universität Bremen, 28334 Bremen, Germany
Single semiconductor quantum dots embedded in microcavities offer the unique opportunity to study different regimes of cavity quantum electrodynamics. The light-matter interaction, especially in the coherent coupling regime, is of particular interest for a variety of applications in quantum information processing and novel effects such as single photon nonlinearities.
In this work, we present comprehensive study on quantum dot (QD) microcavity lasers operating at the intersection of weak and strong light matter interaction. By combined resonant and non-resonant excitation, we distinguish between the gain contribution given by a single resonant QD and small number of nonresonant QDs, where the latter are weakly coupled to the lasing mode via e.g. phonon-induced cavity feeding. This enables us to proof the onset of laser oscillations with a single quantum dot as gain medium. The presented results significantly advance the understanding of single quantum dot lasers and stimulate further experiental as well as theoretical investigations.