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相关概念视频

High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

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The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
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Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

1.1K
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

1.4K
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
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Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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Gas Chromatography: Overview of Detectors01:13

Gas Chromatography: Overview of Detectors

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Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
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相关实验视频

Updated: Jan 17, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

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基于高电子移动性晶体管的单体集成THz探测器

Adam Rämer1, Edoardo Negri2,3, Eugen Dischke1

  • 1Ferdinand-Braun-Institut (FBH), 12489 Berlin, Germany.

Sensors (Basel, Switzerland)
|September 19, 2025
PubMed
概括

我们使用AlGaN/GaN高电子流动性晶体管 (HEMT) 开发了先进的太赫兹 (THz) 直接探测器. 这些探测器具有高灵敏度和低噪声,使得新的太赫兹焦平面阵列 (FPA) 成为可能.

关键词:
这就是THz HEMT天线集成.这是TeraFET.在芯片上的天线天线.电阻混合 电阻混合室温THz的直接探测器

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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相关实验视频

Last Updated: Jan 17, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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科学领域:

  • 特拉赫兹 (THz) 技术的使用.
  • 半导体设备物理学 半导体设备物理
  • 光电学是指光电子产品.

背景情况:

  • 太赫兹直接探测器对于各种成像和传感应用至关重要.
  • 现有的探测器往往在灵敏度,噪声性能或可扩展性方面面临限制.
  • AlGaN/GaN高电子移动性晶体管 (HEMT) 为高频应用提供有前途的材料性能.

研究的目的:

  • 介绍基于AlGaN/GaN HEMTs的新型THz直接探测器.
  • 为了证明在室温下最先进的性能.
  • 为了展示这些探测器对太赫兹焦平面阵列 (FPA) 的可扩展性.

主要方法:

  • 采用多种天线设计的AlGaN/GaN HEMT的单体集成.
  • 制造单像素THz探测器和一个二维THz FPA.
  • 在广泛的频率范围 (0.11.5 THz) 中,探测器性能的理论和实验性表征.

主要成果:

  • 实现了卓越的光学灵敏度 (>20 mA/W至1 THz) 和低噪声等效功率 (NEP<100 pW/Hz).
  • 对于单个探测器来说,在175 GHz时显示了低于10 pW/Hz的创纪录的光学NEP.
  • 成功实现并描述了一个从0.11.1 THz开始运行的功能THz FPA.

结论:

  • 基于AlGaN/GaN HEMT的THz探测器提供卓越的性能,包括在室温下高灵敏度和低NEP.
  • 探测器架构易于扩展,用于实际的太赫兹焦平面阵列应用.
  • 这些发现代表了THz检测技术的重大进步,用于未来的科学和商业用途.