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相关概念视频

IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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相关实验视频

Updated: Jul 16, 2025

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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迪拉克电网格是迪拉克电网格.

Shayan Saeidi, Pavel Cheben, Jens H Schmid

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    概括
    此摘要是机器生成的。

    我们介绍了迪拉克网格,它使用迪拉克函数来获得独特的光谱性质. 这些网格为高阶和第一阶设计提供了相同的光谱特征,从而实现了新的光子应用.

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    科学领域:

    • 光子学和光学 在光子学和光学.
    • 材料科学 材料科学 材料科学
    • 波浪现象是一种波浪现象.

    背景情况:

    • 周期结构在光学中是基本的.
    • 控制光物质相互作用对于先进的光子设备至关重要.
    • 现有的网格在光谱控制方面存在局限性.

    研究的目的:

    • 提出并从理论上验证迪拉克网格的概念.
    • 为了证明高阶和第一阶迪拉克电网的相同光谱特征.
    • 设计迪拉克网格,用于诸如单向反射等应用.

    主要方法:

    • 采用逆里埃转换技术进行格子设计.
    • 使用分析和数值建模.
    • 在介电堆和纳米光子波导中实现迪拉克网格.

    主要成果:

    • 狄拉克网格表现出独特的光谱特性.
    • 较高阶的迪拉克格子表现出与相同长度的第一阶格子相同的光谱特征.
    • 设计结构在异常点上运行,产生单向反射.

    结论:

    • 迪拉克网格为光子系统中的光谱控制提供了一种新的方法.
    • 提出的概念通过分析和数值研究来验证.
    • 在介电堆和波导体中的实际实施证明了可行性.