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関連する概念動画

Electromagnetic Waves01:30

Electromagnetic Waves

11.6K
James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
11.6K
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

5.1K
The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
5.1K
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

4.2K
Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
4.2K
Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

4.0K
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 medium, μ.
Furthermore,...
4.0K
The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

65.7K
The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
65.7K
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.5K
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:
1.5K

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関連する実験動画

Updated: Feb 15, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

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磁気制御可能なトポロジカル・キャビティ・ウェーブガイド・システムにおける電磁波の操作

Maolin Liu, Tao Zhou, Zhewei Fan

    Optics letters
    |February 13, 2026
    PubMed
    まとめ

    この研究は,トポロジック光子結晶のための磁場制御可能なプラットフォームを導入し,調節可能なフィルターと電磁的に誘導された透明性のような効果のための電磁波操作の動的制御を可能にします.

    科学分野:

    • フォトニクス フォトニクスとは
    • 凝縮物質物理学 凝縮物質物理学
    • 電磁気学は,電磁気学である.

    背景:

    • トポロジカル・フォトニック・クリスタル (TPhcs) は,トポロジカル・エッジ (ES) とコーナー・ステート (CS) を通じて電磁波 (EM) の高度な制御を提供します.
    • トポロジカル・キャビティ・ウェーブガイド・システムと同様に,既存のTPhcsシステムには固定された機能があり,統合フォトニクスにおける実用的なアプリケーションを制限しています.

    研究 の 目的:

    • TPhcs.におけるEM波伝送のダイナミックな調節のための磁場制御可能なプラットフォームを提案し,実証する.
    • 多用途のフォトニックデバイスアプリケーションのための調節可能なトポロジカルキャビティウェーブガイドシステムを開発する.

    主な方法:

    • 磁場調節可能なトポロジカルキュービック表面 (TCS) の空洞をエッジステート (ES) ウェーブガイドと結合する.
    • 磁場調節によるEM波伝送行動の操作を調査する.

    主要な成果:

    • 提案されたシステムで調節可能でトポロジカルに保護されたフィルター機能を実証しました.
    • 磁場を制御することによって,電磁的に誘発された透明性のような (EITのような) 調節可能な現象を達成しました.
    • トポロジカルキャビティ・ウェーブガイドシステムでEM波伝送のダイナミックな調節を示した.

    さらに関連する動画

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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    Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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    Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

    Published on: August 21, 2018

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    関連する実験動画

    Last Updated: Feb 15, 2026

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
    11:08

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    19.5K
    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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    Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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    Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

    Published on: August 21, 2018

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    結論:

    • 磁場制御可能なプラットフォームは,TPhcs.でEM波のダイナミック制御を可能にします.
    • このアプローチは,多機能フォトニックデバイスと時間変動システムの設計を容易にする.
    • トポロジカル・キャビティ・ウェーブガイド・システムにおける堅牢なダイナミック・コントロールは,統合フォトニクスの新たな道を開く.