Professor Shen conducts fundamental and applied research on quantum matter. His primary interest is the physics of the “many”, where interactions among multiple constituencies give rise to novel properties not intrinsic to the individual components. His interest also includes ways to utilize the functionality of materials. He sends electromagnetic waves to probe matter, including X-ray, ultra-violet, and microwave radiation from synchrotron, free-electron laser, and laboratory sources. Insights are gained through precision analysis of ejected particles, either photons or electrons. He also prepares materials and devices for his studies.