Optimization of an ultrafast OASLM using photoexcitations in organic thin films : the incoherent-to-coherent conversion efficiency of spectral concentration

Jean-Michel Nunzi , Fabrice Charra , Nicola Pfeffer

Optically addressed spatial light modulators are characterized in terms of pixel density, exposure sensitivity and switching time. Third order nonlinear optical materials are attractive in order to improve on pixel density and switching speed. They are compared using appropriate figures of merit. The picosecond photochromism of some conjugated oligomers makes them prototype materials for thin film incoherent to coherent optical converters. Spectral concentration is identified as the key feature which permits spectrally large exposure sensitivities in single molecules. Molecular engineering rules of the spectral concentration are proposed. Conjugated oligomers of linear polycycles have the required structure in order to achieve 1 pJ/pixel exposure sensitivity in the MHz to GHz frequency range.

Domaines: Articles anciens

Jean-Michel Nunzi, Fabrice Charra, Nicola Pfeffer. Optimization of an ultrafast OASLM using photoexcitations in organic thin films : the incoherent-to-coherent conversion efficiency of spectral concentration. Journal de Physique III, 1993, 3 (7), pp.1401-1411. ⟨10.1051/jp3:1993208⟩. ⟨jpa-00249007⟩