Dr. Ivan Celanovic
Principal Research Scientist, MIT ISN
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Prof. John D. Joannopoulos (1947–2025)
In the early morning hours of August 17, 2025, Prof. John Joannopoulos, ISN Director since 2006 and a member of the MIT faculty since 1974, passed away following an extended battle with cancer. He will be sorely missed as a leader, scientist, educator, mentor, and friend. His legacy will endure.