Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Poster – Quantum Optics, Technologies, and Optomechanics
Q 48.1: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Spatial photon correlations using nearly dead time free ultra-high throughput single photon detection — Verena Leopold1,2, Sebastian Karl1, Jean-Pierre Rivet3, Stefan Richter1,2, •Iurii Datii1, and Joachim von Zanthier1 — 1Quantum Optics and Quantum Information, FAU Erlangen, Germany — 2Photonscore GmbH, Magdeburg, Germany — 3Observatoire de la Côte d Azur, Nice, France
Intensity interferometry recently benefitted from the improvements in single photon detection instrumentation. In this talk we present HBT measurements with a new kind of single photon detectors using a micro channel plate photo multiplier tube. The so called LINPix from Photonscore features an integrated constant fraction discriminator and enables a quantum efficiency of greater than 35% at a wavelength of 405 nm. Together with a matching time to digital converter (TDC), LINTag from Photonscore, the detection system is able to operate at ultra-high count rates of up to 100 MHz and at the same time maintains a very high timing resolution <50ps. With this setup, previously tested in the lab, we were able to perform spatial photon correlations of Vega at the C2PU telescope (15m baseline) at the Calern observatory, Nice, France.
Keywords: Intensity Interferometry; Single photon detection; Time Tagging; Astronomy; Spatial Correlations