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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
954
The Wave Nature of Light02:12

The Wave Nature of Light

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. 
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Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

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Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
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The de Broglie Wavelength02:32

The de Broglie Wavelength

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

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Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
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Photoelectric Effect02:26

Photoelectric Effect

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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...
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相关实验视频

Updated: Jul 16, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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在空腔和波导QED之间的过渡处的光物质相互作用.

Daniel Lechner1, Riccardo Pennetta1, Martin Blaha1

  • 1Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany.

Physical review letters
|September 22, 2023
PubMed
概括

研究人员利用纤维环共振器中的冷原子探索了空腔量子电动力学 (QED) 和波导QED之间的过渡. 他们通过改变共振器长度,观察了从拉比振荡转向非马科夫动态的转变.

科学领域:

  • 量子光学就是一个量子光学.
  • 量子电动力学 量子电动力学
  • 原子物理 原子物理

背景情况:

  • 洞量子电动力学 (QED) 通过离散模式研究光物质相互作用.
  • 波导QED探索了连续模式中的强合,提供了新的可能性.
  • 这两个领域的目标是了解和控制轻物质合.

研究的目的:

  • 实验性地研究从腔体QED到波导QED的过渡.
  • 为了探索光物质在可调节系统中的合.
  • 在QED中弥合离散和连续模式描述之间的差距.

主要方法:

  • 使用一组冷原子与一个带有纳米纤维部分的纤维环共振器相结合.
  • 系统地改变共振器长度以修改模式的光谱密度.
  • 在整个实验中运行在强合模式内.

主要成果:

  • 通过增加共振器长度观察到连续的过渡.
  • 从空腔QED的拉比振荡转向波导QED的非马科夫动力学.
  • 展示了定制模式密度和控制轻物质合的能力.

结论:

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  • 该研究提供了一个实验平台,用于探索空腔和波导 QED 方案之间的过渡.
  • 这些发现突出了光物质相互作用通过控制光谱环境的可调性.
  • 这项工作提供了对基本量子现象和量子技术潜在应用的见解.