Disseminable single-photon source for quantum radiometry
Hristina Georgieva, Thomas Gerrits, Lijun Ma, Riley B. Dawkins, Marco López, Oliver Slattery, Niklas Kanold, Arsenty Kaganskiy, Sven Rodt, Stephan Reitzenstein, Alan L. Migdall, S. Kück · Applied Physics Letters · 2024
We present a disseminable single-photon source based on an InGaAs quantum dot in a micro-mesa. This source achieves a maximum photon flux of (2.74 ± 0.03) × 106 photons/s at a wavelength of (929.7 ± 0.1) nm, with a multiphoton suppression of g(2)(0) = 0.22 ± 0.02. The semiconductor chip can be installed in any cryogenic system and the compact size of all optical components facilitates easy dissemination for interlaboratory comparisons. The consistency in results regarding single-photon purity and the similarity of the measured photon fluxes across two distinct laboratory environments underscores the robustness and versatility of this single-photon source, which shows its potential to be used as a standard source for interlaboratory comparisons in quantum radiometry.