In 1D, correlation effects are always strong, even for materials where Fermi liquid theory works well in the 3D counterpart (think of nanotubes vs. graphite). Many materials are strongly correlated even in 3D and show non-Fermi-liquid ground states. What happens to these correlated states when confined to lower dimensions? We are working with nanowires of vanadium oxides, in which correlations leads to dramatic metal-insulator phase transitions (MITs) as a function of temperature, stress or doping. Our study focuses on understanding the correlated phenomena in VO2 nanowires using ultrafast optical spectroscopy, photocurrent, and photoconductivity measurements. This project is in collaboration with Professor David Cobden’s group.