Regensburg 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 82: Quantum dots and wires: Cavities and photons
HL 82.3: Vortrag
Donnerstag, 14. März 2013, 15:30–15:45, H2
Electrically driven quantum dot single-photon source at 2 GHz excitation repetition rate — •Fabian Hargart, Christian Kessler, Thomas Schwarzbäck, Elisabeth Koroknay, Susanne Weidenfeld, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen, Universität Stuttgart, Allmandring 3, 70569 Stuttgart
Single-photon sources (SPSs) are key components for future applications in the field of quantum information technology such as quantum key distribution or linear optical quantum computing. Electrically driven semiconductor quantum dots (QDs) offer tailorable emission energy, narrow linewidth and an easy excitation scheme. Thus, they are promising candidates for such SPSs.
We investigated the influence of the bias voltage on the emission properties of a red emitting InP/GaInP QD based SPS. Under pulsed electrical excitation we can manipulate the band bending of the p-i-n diode with the applied bias voltage and thus the charge carrier escape by quantum tunneling. This leads to control over this non-radiative decay channel and allows carrier escape times as low as 40 ps, effectively reducing the time jitter of the photon emission. We realized high excitation repetition rates of up to 2 GHz while autocorrelation measurements with g(2)(0)-values of 0.27 proof triggered single-photon emission.