They are named after physicist Max von Laue (1879–1960). In crystallography and solid state physics, the Laue equations relate incoming waves to outgoing waves in the process of elastic scattering, where the photon energy or light temporal frequency does not change upon scattering by a crystal lattice. Laue pattern processing and indexing using NorthStar Real-Time Orientation software. The classification of the scattering regimes is confirmed by simulations in terms of numerical solution of Maxwell’s equations.Equations describing diffraction in a crystal lattice Laue equation The transition between single and multiple scattering is observed for Δ n ≈ 0.16 − 0.25 before multiple scattering dominates for larger Δ n. We find that the kinematic approach describes the shape and intensity distribution of experimental scattering curves in acceptable accuracy as long as Δ n < 0.15. Probing the local strain, shape (size, orientation) and composition of micro and nano materials is the main objective of our Laue micro-diffraction setup. Measured scattering curves of selected Bragg reflections are classified in terms of Δ n. We aim to describe the intensity distribution of diffracting Bragg peaks with analytic expressions similarly to x-ray scattering at electronic crystals. Here we systematically study the scattering of visible light by 3D woodpile photonic crystals with varying internal refractive index contrast Δ n, to determine the limits of the single (kinematic) scattering approach. However, direct conclusions from the Laue diagrams to the underlying crystals structure cannot be drawn, as multiple scattering due to the high index contrast takes place. Note: Author names will be searched in the keywords field, also, but that may find papers where the person is mentioned, rather than papers they authored.īragg diffraction is often used as a tool to assess the structural quality of two-dimensional and three-dimensional (3D) photonic crystals.Before discussing the proposed NN, in this section we present the classical method of indexing Laue patterns by peak-pair recognition (Heizmann & Baro, 1967 Riquet & Bonnet, 1979), which is implemented in most Laue indexing tools. Explains concepts behind Laues experiments and the patterns his team created, and how the Braggs (father and son team) built upon those results to develop w. Use a comma to separate multiple people: J Smith, RL Jones, Macarthur Classical approach to indexing Laue patterns.Use these formats for best results: Smith or J Smith.For best results, use the separate Authors field to search for author names.Use quotation marks " " around specific phrases where you want the entire phrase only.Question mark (?) - Example: "gr?y" retrieves documents containing "grey" or "gray".Asterisk ( * ) - Example: "elect*" retrieves documents containing "electron," "electronic," and "electricity".Improve efficiency in your search by using wildcards. ![]() Example: (photons AND downconversion) - pump.Example: (diode OR solid-state) AND laser.Note the Boolean sign must be in upper-case. Separate search groups with parentheses and Booleans. Micro-beam Laue diffraction is a versatile probe for orientation and elastic strain in individual grains of metallic polycrystals.Keep it simple - don't use too many different parameters.
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