Second Harmonic Generation in Poled Polymer Films Doped with α-Cyano Unsaturated Carboxylic Acids

Okihiro SUGIHARA  Yasuhiko HIRANO  Naomichi OKAMOTO  Yutaka TAKETANI  

IEICE TRANSACTIONS on Electronics   Vol.E76-C   No.10   pp.1523-1528
Publication Date: 1993/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Opto-Electronics
α-cyano unsaturated carboxylic acid,  second harmonic generation,  poled polymer waveguide,  Cerenkov-type SHG,  

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Poled polymer films doped with novel nonlinear organic materials, α-cyano unsaturated carboxylic acid (α-CUCA) derivatives, are prepared. Linear and second-order nonlinear optical properties are investigated. It is found that as the value of hyperpolarizability of the derivatives increases, the second-order nonlinear susceptibility of the film increases. Cerenkov-type second harmonic generation (SHG) of Nd: YAG laser is realized in a poled polymer waveguide doped with the α-CUCA material with a slight absorption at doubled wavelength.