His research interests included novel applications of time-resolved THz spectroscopy (TRTS) and THz time-domain spectroscopy (THz-TDS). In particular, he exploited the unique features of TRTS to characterize the efficiency of electron injection in dye-sensitized photoelectrochemical cells (DSPECs), as well as transient photoconductivity in semiconductors, metal orgnaic frameworks (MOFs), quantum dots, nanoparticles, and nanotubes. He was a founding member of the Yale Green Energy Consortium. A second major research area involves THz-TDS coupled with high level ab initio quantum chemical calculations and to probe and understand the low-frequency collective vibrational modes of a variety of matierlas including organic molecular crystals. A primary goal is to experimentally measure and theoretically compute the optical activity of these low-frequency modes.