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Electron Behavior00:54

Electron Behavior

82.6K
Overview
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the...
82.6K
Subatomic Particles03:37

Subatomic Particles

93.0K
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
93.0K
Mass Spectrometers01:16

Mass Spectrometers

9.6K
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
9.6K
Electron Behavior01:09

Electron Behavior

10.5K
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
10.5K
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

2.1K
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
2.1K
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

2.0K
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...
2.0K

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相关实验视频

Updated: May 6, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

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有条件的量子等离子体传感.

Fatemeh Mostafavi1, Zeinab Jafari2, Michelle L J Lollie1

  • 1Quantum Photonics Laboratory, Department of Physics & Astronomy, Louisiana State University, Baton Rouge 70803, LA, USA.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
概括
此摘要是机器生成的。

量子等离子传感使用弱光信号来检测微妙的样品. 一种新的条件检测方法控制了量子波动,改善了用于增强传感应用的信号噪声比率.

关键词:
微粒减法 微粒减法量子测量是一种量子测量.量子等离子体传感 量子等离子体传感

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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相关实验视频

Last Updated: May 6, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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科学领域:

  • 量子光学就是量子光学.
  • 塑制剂的使用方法
  • 纳米光子学 纳米光子学

背景情况:

  • 量子光子传感旨在使用弱光信号检测微妙的样品.
  • 量子等离子传感器通过表面等离子极子利用纳米级的电磁束来实现高灵敏度.
  • 当前的等离子体传感器受到量子统计波动和固有的损失的限制,阻碍了超出射击噪声极限的灵敏度.

研究的目的:

  • 为量子等离子体传感引入一种新的协议.
  • 为了克服量子波动和等离子体传感损失所带来的局限性.
  • 为了提高利用弱等离子体信号的传感器的信号噪声比.

主要方法:

  • 基于条件检测等离子体的量子等离子体传感协议的开发.
  • 实现等离子减去作为一种控制量子波动的技术.
  • 塑场的特征及其统计波动.

主要成果:

  • 证明通过等离子减去条件检测等离子场可以控制量子波动.
  • 对依赖于等离子信号的光子传感器的信号噪声比有显著的改善.
  • 允许使用弱等离子信号来检测微妙的样品,而不会损害样品的完整性.

结论:

  • 条件等离子体检测为增强量子等离子体传感提供了一条新的途径.
  • 开发的协议提供了一种方法,在等离子体传感中超越射击噪声极限.
  • 这一进步对敏感分子传感和化学检测应用具有重大意义.