A new UV femtosecond pulse shaper for controlling organic photochemistry

We present a femtosecond pulse shaper that operates in the UV. Using a dual array 640 pixel SLM within a reflective mode 4-f configuration, visible light at 508nm is shaped and subsequently doubled in a SHG crystal to give shaped light in the UV at 254 nm. This device is to be used in a pump probe scheme with a constrained feed back optimisation to coherently control benzene S1 photochemistry in order to reach ground state fulvene.