Professor Shum is an experimentalist in studying semiconductor nanostructures for optoelectronic applications such as light emitter, photodetectors, and light modulators. He has taught many years on semiconductor device physics. Prior to joining the Brooklyn College physics faculty, he was a senior design and validation engineer at TriQuint Semiconductor from 2003 to 2005. He held a position of Distinguished Member of Technical Staff at Bell Laboratories/Lucent Technologies and Agere Systems from 2000 to 2003. Dr. Shum was a tenured full professor in the electrical engineering department at the City College of New York from 1998 to 2001. He is the author of over 50 papers and 3 U.S. provisional patent applications.