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Stellar Intensity Interferometry Workshop 2025

13–17 Oct 2025
Research Campus Waischenfeld (Germany) of the Fraunhofer Society
Europe/Berlin timezone

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Session

Detectors for SII and SII with optical telescopes

16 Oct 2025, 11:00
Research Campus Waischenfeld (Germany) of the Fraunhofer Society

Research Campus Waischenfeld (Germany) of the Fraunhofer Society

Fraunhofer-Platz 1, 91344 Waischenfeld

Conveners

Detectors for SII and SII with optical telescopes

  • Christopher Ingenhütt (Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg)

Presentation materials

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  1. 13. Advancements in Stellar Intensity Interferometry with PhotonPix Detectors
    Verena Leopold
    16/10/2025, 11:00
    Invited talk

    We present our recent progress in stellar intensity interferometry, highlighting how large-area single photon counting detectors can advance spatial intensity interferometry (SII) through ultrahigh temporal resolution capabilities. Our work includes two measurement campaigns: the first in April 2024 using off-the-shelf detectors, the second in August 2024 employing the new PhotonPix detector...

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  2. 25. Developing a NIR Heterodyne Interferometer at MPP
    Derek Strom (Max Planck Institute for Physics)
    16/10/2025, 11:35
    Contributed talk

    In addition to direct and intensity interferometry techniques, heterodyning offers several unique advantages for stellar interferometry, and benefits from mature post-processing methods developed for radio astronomy. We introduce a new lab setup which explores potential improvements to stellar interferometry using NIR heterodyning. Constructed at the Max Planck Institute for Physics (MPP), the...

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  3. 29. Large, high performance superconducting microwire detectors for astronomy
    Iman Esmaeil Zadeh (TU Delft)
    16/10/2025, 11:50
    Contributed talk

    Superconducting nanowire single-photon detectors (SNSPDs) have been at the forefront of many recent breakthroughs in optical science. Their ultrahigh efficiency and ultralow timing jitter make them especially promising for astronomical applications, such as intensity interferometry. However, the small active area of conventional SNSPDs and the need for large detector sizes present significant...

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  4. 5. Intensity interferometry at Calern and beyond: towards wavelength multiplexing and the resolution of Sirius B
    William Guerin (Université Côte d'Azur, CNRS, Institut de Physique de Nice)
    16/10/2025, 12:05
    Invited talk

    I will present the current status of the work done by our "Intensity Interferometry at Calern" (I2C) consortium in Nice (France) on the revival of intensity interferometry with optical telescopes.
    I will first briefly summarized what we have done in the last years: We have demonstrated intensity correlations using stellar light for the first time in the photon-counting regime, using...

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