Studies Of Spectral Properties Of The Azo Polymers By Raman And Infrared Spectroscopy And Their Appliance To Spatial Light Modulator

1 The study of Infrared and Raman Spectrum of a new azo polymerThe Infrared and Raman Spectrum of a new Azo polymer has been observed for the first time. We have assigned the Infrared and Raman peaks according to the Infrared and Raman spectrum of the monomers of this polymer. After studying the spectrum, we concluded that there are no obvious interactions between the monomers, and changing the polymerization rate will not influence the optical properties of this kind of Azo polymer.2 The Study on the Theories of the Optically Induced Reorientation of Azo Polymers and their SERS(Surface Enhanced Raman Spectrum)Because neither the Molecular Hole-Burning Theory nor the Molecular Angular Reorientation Theory can explain the experimental results ..of this new Azo' Polymers, we should amend these theories. We point out that: the two preconditions of the above two theories-the azo molecular is one-dimensional and isotropic are not right when they are applied to the thin films of this new Azo Polymer. We should take into account that azo polymers are multidimensional and are asymmetric in their spatial distribution. By Comparing the normal Raman and Surface Enhanced Raman Spectrum, we concluded that the azo polymers are inclined to adsorb on the surface vertically, their distribution are neither isotropic nor simple Boltzman Distribution, but are something like the Boltzman Distribution under the Gravitational Force. We amended the preconditions and tried to explain the experimental results.3 The Theoretical Analysis of Azo Controlling Spatial Light Modulator According to the Photo-Induced Reorientation properties of azo molecules, we point out that this property can be used to control the modulating properties of Spatial Light Modulators. Aligning the Azo molecules laterally on the quartz substance, when the polarizing direction of the controlling light changes, the directions of the Azo molecules will change according to the controlling light. Although there are some shortcomings of this Azo Spatial Light Modulator, we can overcome these shortcomings by choosing different Azo and Liquid Crystalline Molecules.