Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 28: Poster – Quantum Optics
Q 28.25: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 2. OG
Multi-Wavelength Stellar Intensity Interferometry with a Telescope Array — •Iurii Datii1, Oren Ironi2, Nick Konidaris3, Sagi Ben-Ami2, and Joachim von Zanthier1 — 1Quantum Optics and Quantum Information, FAU Erlangen, Germany — 2Weizmann Institute of Science, Rehovot, Israel — 3Carnegie Observatories, Pasadena, USA
Recent progress in single-photon detection has renewed interest in stellar intensity interferometry. We present a concept for an HBT (Hanbury Brown Twiss) experiment combining a spectrograph with a telescope array to achieve a broad optical bandwidth. The spectrograph minimizes light loss from filtering, while the SPAD Lambda detector (with 320 linearly arranged pixels) covers Δλ = 0.2 nm per pixel, greatly improving the signal-to-noise ratio.
The setup employs twenty 60 cm telescopes, offering a large effective collecting area at about 10% the cost of a single telescope with a diameter of 2.7m. This compact, cost-efficient array enables affordable large-baseline optical intensity interferometry and precise measurements of stellar diameters.
Keywords: Intensity Interferometry; Single photon detection; Astronomy; Spatial Correlations