Frank Stem
C R C Critical Reviews in Solid State Sciences
A simple two-state model is developed describing the first hyperpolarizability β. The model is applicable to molecules consisting of an electron donor separated from an electron acceptor by a π-conjugated link. This approach has the advantage of yielding simple algebraic expressions for the hyperpolarizability. The relationship between β0 (the hyperpolarizability extrapolated to zero frequency) and the wavelength of the absorption maximum λmax is shown explicitly. This relationship is consistent with experimental results for p-substituted benzenes. One also obtains an expression relating β0 and the length of the conjugated system connecting donor and acceptor ends of the molecule.
Frank Stem
C R C Critical Reviews in Solid State Sciences
William Hinsberg, Joy Cheng, et al.
SPIE Advanced Lithography 2010
G. Will, N. Masciocchi, et al.
Zeitschrift fur Kristallographie - New Crystal Structures
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009