T. Verbiest, D.M. Burland, et al.
Macromolecules
Values of the second order hyperpolarizability β have been determined for p-nitroaniline (PNA) in solvents of varying polarity using the electric field induced second harmonic generation experimental technique. An observed solvent dependence of β0, the second order hyperpolarizability extrapolated to zero-frequency, is correlated with the solvent-induced shift of the PNA charge transfer absorption maximum λmax. The correlation is similar to the correlation between λmax and β0 observed in donor/acceptor p-substituted benzenes with different substituents. Both dependences can be understood within the framework of a simple four level Hückel model. © 1992.
T. Verbiest, D.M. Burland, et al.
Macromolecules
W.E. Moerner, G.C. Bjorklund, et al.
OTF 1993
F.C. Bos, Todd Guion, et al.
Physical Review B
M.C.J.M. Donckers, S.M. Silence, et al.
Optics Letters