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相关概念视频

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

252
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
252
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

258
Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
258
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

508
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
508
Photoelectric Effect02:26

Photoelectric Effect

29.0K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
29.0K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

41.5K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
41.5K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

144
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....
144

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Updated: May 7, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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一个集成的光子引擎用于可编程的原子控制.

Ian Christen1, Thomas Propson2, Madison Sutula2

  • 1Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA. ichr@mit.edu.

Nature communications
|January 2, 2025
PubMed
概括
此摘要是机器生成的。

我们开发了一个可扩展的光子控制系统,使用量子技术的集成可见光调制器. 这使得基于原子的系统能够精确控制,从而推进量子计算和传感应用.

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相关实验视频

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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科学领域:

  • 量子技术 量子技术 量子技术
  • 综合光子学 综合光子学
  • 光学是什么?光学是什么?光学是什么?

背景情况:

  • 可扩展,高性能光学控制对于推进基于原子的量子技术至关重要.
  • 目前的电信波长的集成光子学对可见光原子系统缺乏透明度.
  • 调节单个光束是控制原子阵列的关键.

研究的目的:

  • 为基于原子的量子系统提出和实施可扩展,可重新配置的光子控制架构.
  • 克服可见光应用的电信集成光学的透明度限制.
  • 为了使原子类发射器的精确空间和光谱定位.

主要方法:

  • 开发集成可见光调节器,使用薄膜酸.
  • 综合光子学与自由空间光学和全息学的结合.
  • 多通道,千兆赫兹率可见光束成型的演示.

主要成果:

  • 成功实现了一个可扩展和可重新配置的光子控制架构.
  • 展示千兆赫兹率可见光束的形状,以实现精确的控制.
  • 实现空人工原子的空间和光谱定位.

结论:

  • 拟议的架构为量子技术中的光学控制提供了一个可扩展的解决方案.
  • 集成可见光调节器提供了一条超越现有光子平台局限性的道路.
  • 该系统可方便动态控制和处理单个原子类发射器.