Dr. Tun Cao is a full professor from School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, China. His research has centred on the nanophotonics, this is the study of light at the nanometre scale. Over the past few decades people have realized that nanoscale structuring of the geometry of a material can dramatically affect the way light interacts with the material. He wants to apply these ideas to energy and biosensing applications. Metamaterials (MMs) are typically periodic structures with a period much smaller than a guided wavelength which gives rise to an effective material with unusual properties such as negative refraction. His contributions to this field include the design and demonstration of the tunable MMs as well as optical trapping using MMs. He has published more than 100 journal and 30 international conference papers (10+ invited) in the areas of fabrication, modeling, and measurement of photonic crystal and metamaterials based devices. As a principle inventor, he has 30+ invention patents authorized by State Intellectual Property Office of P. R. China (SIPO) and 40+ invention patents under examination currently.