In the present study, we developed a fabrication process of an electrically driven single-photon LED based on InP QDs emitting in the red spectral range, the wavelength of interest coinciding with the high efficiency window of Si APDs. A deterministic lithography technique allowed for the pre-selection of a suitable QD, here exclusively operated under electrical carrier injection. The final device was characterized under micro-electroluminescence in direct current, as well as in pulsed excitation mode. In particular, under pulsed excitation of one device, single-photon emission of a spectral line, identified as an exciton, has been observed with graw(2)(0)=0.42±0.02, where the non-zero g(2)-value is mainly caused by background contribution in the spectrum and re-excitation processes due to the electrical pulse length. The obtained results constitute an important step forward in the fabrication of electrically driven single-photon sources, where deterministic lithography techniques can be used to sensibly improve the device performances. In principle, the developed process can be extended to any desired emitter wavelength above 600nm up to the telecom bands.
@article{arxiv.1902.01180,
title = {Single-photon light emitting diodes based on pre-selected quantum dots using a deterministic lithography technique},
author = {Marc Sartison and Simon Seyfferle and Sascha Kolatschek and Stefan Hepp and Michael Jetter and Peter Michler and Simone Luca Portalupi},
journal= {arXiv preprint arXiv:1902.01180},
year = {2019}
}