Tony Levi joined the faculty at the University of Southern California in mid-1993 after working for 10 years at AT&T Bell Laboratories. He invented hot electron spectroscopy, discovered ballistic electron transport in heterostructure bipolar transistors, demonstrated room temperature operation of unipolar transistors with ballistic electron transport, created the first microdisk laser, and carried out work in parallel fiber optic interconnect components in computer and switching systems. His current research interests include high-performance electronic and photonic systems, RF photonics, very small lasers and modeling their behavior, and optimal design of small electronic and photonic systems. To date he has published numerous scientific papers, several book chapters, is the author of the books Applied Quantum Mechanics and Essential Classical Mechanics for Device Physics , coeditor of the book Optimal Device Design , and holds 17 US patents.