Title :
Nonlinear optical properties of conjugated oligomers: a simple model for length dependence and conformation
Author :
Verbandt, Y. ; Thienpont, H. ; Veretennicoff, I. ; Geerlings, P. ; Rikken, G.L.J.A.
Author_Institution :
Appl. Phys. Dept., Vrije Univ., Brussels, Belgium
Abstract :
In conclusion, we have shown that resonant tunneling phenomena alone can account for the length dependence of the optical properties of conjugated systems. In addition, we have quantitatively studied the effect of a twist in the conjugated chain by using a very simple relationship between the spacing of the minima in the potential profile and the dihedral angle between the tilted px orbitals. The results on the biphenyl molecule are in good agreement with the experimental data. The very simple parametrisation of the model makes it a powerful tool for the estimation of the optimum length of newly designed conjugated molecules
Keywords :
modelling; molecular configurations; nonlinear optics; optical materials; organic compounds; tunnelling; biphenyl molecule; conjugated chain; conjugated molecules; conjugated oligomers; conjugated systems; dihedral angle; length dependence; molecular conformation; nonlinear optical properties; optical properties; optimum length; potential profile; tilted px orbitals; Bonding; Electrons; Internet; Nonlinear optics; Optical films; Optical polarization; Optical saturation; Oscillators; Photonic band gap; Physics;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 1994. NLO '94 IEEE
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1473-5
DOI :
10.1109/NLO.1994.470879
