Chao-Lin’s group use the most ancient light, the Cosmic Microwave Background (CMB) radiation, emitted when the universe was in its infancy to shed light on the question of how the universe began. Currently Chao-Lin's group are involved in a number of experiments such as BICEP/BICEP2/Keck Array and have been working hard on detecting primordial B-mode polarization. His group are involved in both he design and construction of instruments as well as the data analysis and theoretical interpretation.
BICEP2 first detection of primordial B-modes. Credit the BICEP and Keck Array Team.