Accession Number : ADA316445

Title :   Design, Synthesis and Characterization of Novel Nonlinear Optical Materials.

Descriptive Note : Final rept. 1 Apr 93-31 Mar 96,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s) : Prasad, Paras N.

PDF Url : ADA316445

Report Date : 31 MAR 1996

Pagination or Media Count : 26

Abstract : The research accomplished in this project consists of four tasks each dealing with a different class of nonlinear optical (NLO) materials. Task (I): Second-order nonlinear optical materials. We developed new chromophores and processing to produce electro-optic materials with enhanced optical transparency towards the visible (>=700 nm), increased chemical and thermal stability and stability of poled alignment for 1000 hours at 100 deg C. Several approaches showed promises and we accomplished a great deal. Also, we developed polyurethane cross-linking polymers to produce thermally stable poling alignment in both molecular-ionic type and neutral type second-order chromophores. In both cases stability up to 1000 hours at 100 deg C was achieved. In another approach, in collaboration with Professor Shea of University of California, Irvine, we have employed ormosils to produce stable poled alignments. Task (II): Third-order nonlinear optical materials. We synthesized a group of phosphoylides containing a polarizable P atom and investigated their X(3) behavior via femtosecond Kerr gate measurements. By using optically heterodyned and phase-tuned Kerr gate techniques, we obtained both the signs and the magnitudes of the real and the imaginary components of X(3).

Descriptors :   *OPTICAL MATERIALS, *NONLINEAR OPTICS, MAGNETIC PROPERTIES, ELECTROOPTICS, SYNTHESIS, CHEMICALS, CHROMOPHORES, POLYMERS, COMPOSITE MATERIALS, THERMAL STABILITY, CROSSLINKING(CHEMISTRY), DESIGN CRITERIA, POLYURETHANE RESINS, PHOSPHORUS, TRANSPARENCIES, KERR CELLS.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Polymer Chemistry
      Electricity and Magnetism
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE