We use numerical optimization to find a one-dimensional potential energy function that yields the largest hyperpolarizability, which we find is within 30% of the fundamental limit. Our results reveal insights into the character of the potential energy functions and wave functions that lead to the largest hyperpolarizability. We suggest that donor–acceptor molecules with a conjugated bridge with many sites of reduced conjugation to impart conjugation modulation may be the best paradigm for making materials with huge hyperpolarizabilities that approach the fundamental limit.
© 2006 Optical Society of America
Original Manuscript: May 22, 2006
Revised Manuscript: July 7, 2006
Manuscript Accepted: July 19, 2006
Published: September 11, 2006
Juefei Zhou, Mark G. Kuzyk, and David S. Watkins, "Pushing the hyperpolarizability to the limit," Opt. Lett. 31, 2891-2893 (2006)