Dresden 2020 – scientific programme
The DPG Spring Meeting in Dresden had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
HL: Fachverband Halbleiterphysik
HL 64: Poster II
HL 64.35: Poster
Thursday, March 19, 2020, 10:00–13:00, P1A
Chirped single photons from a semiconductor quantum-dot — •David Bauch1, Dirk Heinze1, Artur Zrenner1, and Stefan Schumacher2 — 1Department of Physics and CeOPP, Paderborn University, Paderborn, Germany — 2College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
On demand sources for controlled single photon emission are essential for quantum information theory. Exciton emission or cascaded biexciton-exciton emission in semiconductor quantum dots offer the potential for optically controlled generation of a single photon [1] and polarization-entangled twin photons [2]. In contrast to pure optical control, externally applied time-dependent electrical fields enable control of the (bi-)exciton resonance (electronic chirp), resulting in changes of the excitation dynamics and the resulting photon emission. Combining both optical and electronic control of the photon emission might be significant for future integration into optoelectronic devices. Here we investigate the influence of electronic chirps on the generation of single photons via (bi-)exciton (two-)photon emission and biexciton-exciton emission cascades and determine quantum properties and spectral characteristics of the emitted photons in a high- and low-quality resonator. For exciton emission we show suppression of Rabi-splitting in high-quality cavities and on-demand triggering of photon emission while retaining spectral properties.
[1]: Heinze, D., Breddermann, D., Zrenner, A., Schumacher, S. Nat. Commun. 6, 8473 (2015). [2]: Heinze, D., Zrenner, A., Schumacher, S. Phys. Rev. B 95, 245306 (2017).