Nonlinear optical properties of highly oriented polydiacetylene evaporated films

Abstract

Third-order harmonic generation has been measured on highly oriented polydiacetylene (PDA) films prepared by the vacuum deposition method. Experimental values of the third-order electric susceptibility χ(3) measured for pumping laser polarized parallel to the polymer chain show a sharp three-photon resonance to the 1Bu exciton in PDA. Potential usefulness of these highly oriented PDA evaporated films in nonlinear optical applications is suggested.

Large Third-Order Optical Nonlinearity of Cu-O Chains Investigated by Third-Harmonic Generation Spectroscopy

“…The jx ͑3͒ ͑23v; v, v, v͒j value at v A reaches 1 3 10 29 esu. This is comparable to the maximum value of jx ͑3͒ ͑23v; v, v, v͒j in polydiacetylene, which is one of the representatives of third-order nonlinear optical materials [15]. The two structures A and B in the jx ͑3͒ ͑23v; v, v, v͒j spectrum of Sr 2 CuO 3 should be related to multiphoton resonant processes.…”

Platinum-segmented polydiacetylenes

“…PDAs are considered quasi one‐dimensional semiconductors having macroscopic long‐range coherence and anisotropy, which undergo intriguing optical changes among blue, red and yellow phases upon exposure to external stimuli . PDAs have found applications in nonlinear optics, organic conductors, and most widely, as sensory materials . However, PDAs have rarely been applied in solution processed organic electronic devices.…”

Oriented Thin Films for Nonlinear Optics

“…Kanetake et al [12] proposed a technique, currently used in oriented thin film preparation from liquid crystals, and consisting in an epitaxy of organic molecule on a preoriented substrate by rubbing.…”

“…Fig. 1) we used the technique applied by Kanetake et al [12] for another polydiacetylene. The difference between the two studied polymers consists in the replacement of one 4-BCMU group in p-4BCMU by a DCH group.…”