It has been well recognized that, if the incident electromagnetic wave is linearly polarized parallel or perpendicular to grooves of a surface, the far-field scattering from a 1-D rough surface will have an identical polarization. We present recent experimental results and the comparative theoretical analysis that cover the enhanced backscattering from a characterized randomly rough 1-D vacuum/dielectric interface for p and s polarizations. It is believed that the observed enhanced backscattering results from the coherent interference of multiply scattered optical paths with their time-reversed partners when the wave vectors of the incident and scattered light are oppositely directed. This coherency is lost for scattering into directions other than the retroreflection direction.
Ion beam sputtering (IBS) is an easily controlled, energetic deposition process. Thin film coatings produced using IBS are superior in terms of scatter, absorption, losses and homogeneous optical properties. The process and properties of coatings produced using IBS will be discussed.
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