Abstract
N-(4-nitrophenyl)-L-pro!inol (NPP) is an organic molecular crystal developped by molecular engineering,1 that exhibits one of the highest phase-matchable second-order susceptibilities reported so far in the near-infrared spectral range (deff=56 pm/V). However, the large spatial and temporal walk-off existing in NPP can limit severely the usefulness of the material away from the noncritical phase-matching (ncpm) wavelength and for shorter pulses2
© 2001 Optical Society of America
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