Francis Halzen

Physicist

Professor Francis Halzen is a renowned physicist and Vilas Research Professor at the University of Wisconsin–Madison, where he joined the physics faculty in 1972. Born in Belgium, Halzen earned his master’s and doctoral degrees from the University of Louvain. He is internationally recognized for his pioneering work in neutrino astronomy and his leadership in developing IceCube, the world’s largest neutrino observatory, located deep beneath the ice at the South Pole.

Halzen oversaw the design and development of IceCube and its predecessor, AMANDA. Completed in 2010, IceCube instruments a billion tons of Antarctic ice to detect the faint blue light produced when high-energy neutrinos interact with matter. The observatory has opened a new window into the universe, enabling scientists to investigate some of its most energetic and distant phenomena. Today, the international IceCube collaboration includes more than 450 scientists from 58 institutions across 14 countries, with plans underway to significantly expand the observatory’s capabilities.

A fellow of the American Physical Society since 1994, Halzen has received numerous prestigious honors, including the 2014 Smithsonian American Ingenuity Award, the 2015 Balzan Prize, the 2018 Bruno Pontecorvo Prize, the 2019 IUPAP Yodh Prize, the 2021 Bruno Rossi Prize and Homi Bhabha Award, and the 2026 APS Medal for Exceptional Achievement in Research. In 2024, he was elected to the National Academy of Sciences. He also holds honorary doctorates from several universities.

Through his groundbreaking research and leadership, Halzen has helped establish neutrino astronomy as a powerful tool for exploring the universe and advancing our understanding of the cosmos.

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Francis Halzen

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