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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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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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IR Spectrum01:19

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When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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覆盖可见光谱的集成光学阶段式数组系统.

Henry Crawford-Eng, Andres Garcia Coleto, Jelena Notaros

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    概括
    此摘要是机器生成的。

    研究人员开发了一种集成光学相位阵列 (OPA) 系统,用于同时控制红色,绿色和蓝色光束. 这种可见光谱OPA技术使显示器和光通信领域的新应用成为可能.

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    科学领域:

    • 光子学是指光子学的使用方法.
    • 光学工程是指光学工程.
    • 材料科学 材料科学 材料科学

    背景情况:

    • 集成光学相位阵列 (OPA) 对于光束操纵至关重要.
    • 现有的OPA系统往往缺乏可见光谱的能力.
    • 同时控制多种颜色是一个很大的挑战.

    研究的目的:

    • 设计和演示首个集成的OPA系统,用于同时控制红色,绿色和蓝色光束.
    • 开发一个覆盖可见光谱的OPA架构和必要的设备.
    • 为了实现需要可见光操作的新应用.

    主要方法:

    • 开发了一种全新的集成OPA系统架构.
    • 使用300毫米晶圆尺度的光学造工艺制造了该系统.
    • 实验证明了在红色,绿色和蓝色波长中同时进行2D光束转向.

    主要成果:

    • 成功设计和制造了一套在可见光谱中运行的集成OPA系统.
    • 实现了对红色,绿色和蓝色光的同时2D光束转向.
    • 通过显示麻省理工学院标志的2D RGB图像来展示系统的能力.

    结论:

    • 本文介绍了首个能够同时发射和控制可见光束的集成OPA系统.
    • 开发的技术为显示器,3D打印和光通信中的可见光谱OPA开辟了可能性.
    • 实现了原子量子系统,水下光通信和光遗传学的进步.