Risultati della ricerca - "Optical Society"

Understanding and controlling of the polishing process on conventional NC (Numerical Control) machines is an important step to optimize production, reduce machine time and increase production quality. Nevertheless, due to the high number of process parameters, polishing is not understood and is almo...

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Accurate and uniform fabrication of microstructures on highly curved substrates requires exposure with the waist of a focused laser beam at every point. In order to realize this, the exposure beam must be held perpendicular and focused onto the local substrate. Here we present an optical tool for ou...

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This manuscript explores the novel characteristics of surface plasmon polaritons (SPPs) in the terahertz (THz) frequency region by numerically investigating the magnetized plasma–graphene-magnetized plasma–perfect magnetic conductor (PMC) planar interface. Substrates are assumed to be PMCs. The disp...

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A complete description of a three-dimensional (3D) polarization state is provided by the two most significant eigenstates of the polarization matrix, together with the two indices of polarimetric purity. By means of the so-called smart decomposition, such information can be arranged to represent the...

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In this work we extend the optimum phase triplicator diffraction grating profile to a phase-only hologram. This modified hologram generates three equally-energetic orders with the highest diffraction efficiency, yielding a direct version and an inverted complex conjugate version of the target patter...

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Dynamic and high-resolution air fluctuation (wavefront aberration) measurements are necessary for precision interferometry and astronomical observations. In this paper, to solve the problem, we propose a measurement system that uses sinusoidal phase modulation interferometry to observe 2-dimensional...

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We design a novel grating out-coupler while maintaining a Gaussian-shaped far-field output. The approach is based on the patterning of a grating in a SiGe layer on the top surface of a 3-μm-thick Si waveguide. The grating aims at coupling the guided signal into a beam vertically out from the surface...

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Hyperspectral images contain rich spatial distribution and spectral information of land features, but they also introduce high information redundancy and computational complexity. This paper proposes dimensionality reduction methods that integrate spatial-spectral preservation and minimum noise frac...

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