THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORK STONY BROOK United States
Supported by the AFOSR, we have worked on the development of high repetition-rate sources of vacuum ultraviolet and extreme ultraviolet XUV radiation for photoemission experiments. This effort has had three main thrusts 1 The refinement of Cavity-Enhanced High Harmonic Generation CE-HHG to be a usable light source for 100 ts-resolution photoemission experiments. 2 The investigation of incorporating gating schemes into CE-HHG to produce attosecond pulses. 3 The development of a high-average power mid-lR frequency comb for driving harmonics in solids. Effort 2 led us to the conclusion that CE-HHG was not the best way to achieve high rep-rate attosecond pulses and Efforts 1 and 3 have led to further ongoing work including pursuing single-pass solid-state HHG for high repetition rate isolated attosecond pulses.