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arXiv · 1902.01180

Single-photon light emitting diodes based on pre-selected quantum dots using a deterministic lithography technique

Marc Sartison·Simon Seyfferle·Sascha Kolatschek·Stefan Hepp·Michael Jetter·Peter Michler·Simone Luca Portalupi
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Abstract

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 $g^{(2)}_\mathrm{raw}(0)=0.42\pm0.02$, 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 $600\,\mathrm{nm}$ up to the telecom bands.

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Marc Sartison, Simon Seyfferle, Sascha Kolatschek, Stefan Hepp, Michael Jetter, Peter Michler, Simone Luca Portalupi. 2019-02-04. Single-photon light emitting diodes based on pre-selected quantum dots using a deterministic lithography technique. https://doi.org/10.1063/1.5091751

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