Topic
Physical optics
About: Physical optics is a research topic. Over the lifetime, 5342 publications have been published within this topic receiving 101388 citations. The topic is also known as: wave optics.
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TL;DR: In this article, the authors review recent progress in application of femtosecond laser nanostructuring of fused silica and demonstrate tight control of nanostructure' properties through writing parameters.
Abstract: We review recent progress in application of femtosecond laser nanostructuring of fused silica. The tight control of nanostructures’ properties through writing parameters is demonstrated implementing elements with unique optical properties, which can be widely used in material processing, microscopy, optical trapping and manipulation.
209 citations
TL;DR: In this article, the polarization characteristics of geomagnetic micropulsations are investigated using quasi-monochromatic wave train theory of physical optics, and the polarization of a wave train is analyzed by considering the coherency matrix of the wave field.
Abstract: The polarization characteristics of geomagnetic micropulsations are investigated using quasi-monochromatic wave train theory of physical optics. The polarization of a wave train is analyzed by considering the coherency matrix of the wave field. The elements of the matrix are calculated over the desired frequency band and the polarization parameters evaluated. Since the determinant of the coherency matrix is zero for a totally polarized wave field, this property can be used to separate a partially polarized wave field into its polarized and unpolarized parts. The ellipticity, orientation, and sense of polarization for the polarized portion are then calculated in terms of the matrix elements using power and cross-power spectral analysis techniques. Based on this approach, the polarization of a number of different signals has been digitally determined. Test cases include a random number time series, a constructed signal with a predetermined polarization, and an example typical of geomagnetic micropulsations resulting from high-altitude nuclear weapons tests superimposed on high natural background. The results of these analyses are then compared with those from the standard hodogram technique and the effectiveness of both methods discussed in terms of the signal characteristics.
199 citations
TL;DR: The technical merits of weak value amplification techniques are analyzed and it is demonstrated that weak value techniques can put all of the Fisher information about the detected parameter into a small portion of the events and show how this fact alone gives technical advantages.
Abstract: ``Weak-value amplification,'' an interference effect that was introduced quantum mechanically, but can also be realized using classical electromagnetic waves, uses only a small fraction of the available events to make precise measurements. How can this be? Theorists reveal that weak-value amplification achieves that by funneling all the information into a small fraction of events.
199 citations