Marc A. Kastner (born November 20, 1945) is an American physicist and Donner Professor of Science and the former dean of the School of Science at the Massachusetts Institute of Technology.
His early research focused on the relationship between chemical bonding and the electronic structure of defects in glasses.
It is a device in which electrostatic fields confine electrons to a small region of space inside a semiconductor.
In an interview, he said that the discovery that a transistor could turn on and off again every time an electron was added to it was one of the most astounding and exciting experiences of his life.
His recent research focused on the electronic properties of nanometer-size semiconductor structures and on the physics of high temperature (Tc ) superconductivity.