American physicist who was the US Secretary of Energy from 2009 to 2013. He won the Nobel Prize in Physics in 1997 for his contributions to the cooling and trapping of atoms with laser light.
He earned his Ph.D. in physics from the University of California, Berkeley, in 1976.
He is a member of the United States National Academy of Sciences, the American Academy of Arts and Sciences, the American Philosophical Society and the Academia Sinica.
He married Jean Fetter in 1997.
He was appointed the Secretary of Energy by President Barack Obama.