J. Y. Lee

TL;DR: In this paper, the anisotropic photocurrent behavior in thin-film polydiacetylene single crystals is investigated as a function of laser intensity and sample temperature, and the results indicate that photocurrent behaviour in these quasi-one-dimensional semiconductors is strongly influenced by the nature and organization of the side groups.

TL;DR: In this article, quadratic electro-optic coefficient measurements on a dye doped photocrosslinkable nonlinear optical (NLO) polymer-PVCN (polyvinylcinnamate)/CNNB-R (3-cinnamoyloxy-4-[4-(N,N-diethylamino)-2-cinkamide phenylazo] nitrobenzene) at different dye concentrations are reported.

TL;DR: In this article, the second order nonlinear optical coefficient and the short and long term decay constants of second harmonic generation (SHG) intensity of the poled polymeric films are obtained from SHG measurements.

TL;DR: In this article, temperature and frequency dependent measurements are utilized to study the relaxation behavior of a photocrosslinking nonlinear optical (NLO) material based on a polyvinylcinnamate (PVCN) polymer matrix.

Abstract: An easily processable photocrosslinking guest-host system with stable second order nonlinear optical properties using polyvinylcinnamate as a host polymer has been developed 1–2 . Samples were made as free standing films from photo-crosslinkable polyvinylcinnamate and different concentration levels of 3-cinnamoyloxy-4-[4-(N, N'-diethylamino)-2-cinnamoyloxy phenyl azo] nitrobenzene. Photo-crosslinking was carried out by ultraviolet radiation at the major wavelengths viz. 297 and 313 nm subsequent to corona poling. Dynamic mechanical properties of these polymer films were investigated. The changes in the storage and loss moduli, as well as relaxation behavior of the system upon crosslinking and poling are discussed.