20 January 1994 Integrated optics waveguide spectroscopy of self-organizing polymers and fractal composites
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Abstract
Integrated optics Raman scattering is used as an autoscopic probe of planar waveguides fabricated from chiral polymer media or fractal nanocomposites of Rayleigh limit gold or silver particles. The latter behave as electric field intensifiers and are used to enhance the third order nonlinear optical response of the composite films. In chiral media, TE or TM modes launched in the waveguides produce polarized Raman scattering that exhibits a complex dependence on the sample preparation conditions. Fractal aggregates of metallic nanoparticles confer unique properties on the optical response of the composite. The cubic optical nonlinearity of the fractal composites is evaluated by quadratic electro-optic phase modulation. (Chi) (3) is enhanced by a factor of 106 in the wings of the extinction spectrum, far from the maximum associated with plasma resonances of individual metal particles. The enhancement is essentially dispersionless in the low energy region of the extinction spectrum of the composite. A fast d-electron response in the metal is thought to be responsible for the enhancement effect.
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Mark P. Andrews, Mark P. Andrews, Tanya S. Kanigan, Tanya S. Kanigan, Wenbo Xu, Wenbo Xu, Mark G. Kuzyk, Mark G. Kuzyk, } "Integrated optics waveguide spectroscopy of self-organizing polymers and fractal composites", Proc. SPIE 2042, Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects, (20 January 1994); doi: 10.1117/12.166315; https://doi.org/10.1117/12.166315
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