Along with Yoichiro Nambu of the University of Chicago, he is credited with introducing the SU(3) symmetry of quarks, today known as the color charge.
He is survived by his wife, Chang Ki, three children, Grace Hewon, Christopher Su-Young, and Anthony Suh-Young, and an array of grandchildren.
Nambu shared 2008 Nobel Prize in Physics for a related work on applying the mechanism of spontaneously broken symmetry, enabling the electroweak sector of the Standard Model.
[2] From 1993 to 1995, Han served as the inaugurating chair of the Outstanding Young Researcher Award (OYRA) Committee of AKPA.
He delivered the keynote address at the 2001 Asian Pacific Heritage Month Celebration at the US-Environmental Protection Agency in Research Triangle Park, North Carolina in May, 2001.