Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

528
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
528
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

45.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
45.4K
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

4.4K
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...
4.4K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.3K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.5K
Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

1.8K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
1.8K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Spin-multiplexed point spread function engineering via dielectric metasurface for simultaneous optical differentiation and high-resolution imaging.

Light, science & applications·2026
Same author

Wireless Microneedle Patch with Integrated Electrochemical Sensor for In Situ Detection of Melanoma Biomarker Tyrosinase in ISF.

Analytical chemistry·2026
Same author

Sensitive infrared photodetection enabled by in-sensor background-offset cancellation in a mixed-dimensional van der Waals heterostructure.

Nature communications·2026
Same author

Observation of Floquet rotational super-radiance.

Nature·2026
Same author

Chiral Quasi-Bound States in the Continuum on the Verge of the Light Cone.

Nano letters·2026
Same author

Pathomechanism of Fever-Induced Liver Failure in NBAS Deficiency and Treatment Effect of NAC-Observations In Vitro and In Vivo.

Liver international : official journal of the International Association for the Study of the Liver·2026

関連する実験動画

Updated: Oct 23, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

12.4K

フロントハイパーボリック表面ポラリトン 散発性アニゾトロプ結晶

Weiliang Ma1, Guangwei Hu2,3, Debo Hu4

  • 1Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China.

Nature
|August 19, 2021
PubMed
まとめ

研究者らはアニゾトロプ材料でゴーストフォノンポラリトンを発見し,ナノスケールの光制御を可能にしました. これらのユニークなポラリトンは,高度な光学アプリケーションのための長距離,方向的な伝播と調節可能なトポロジカルトランジションを示します.

さらに関連する動画

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

17.8K
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

19.1K

関連する実験動画

Last Updated: Oct 23, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

12.4K
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

17.8K
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

19.1K

科学分野:

  • 凝縮物質物理学
  • ナノフォトニクス
  • 材料科学

背景:

  • ナノスケールで独特の光操作特性を有している.
  • 既存のポラリトンは,バルク (内部に広がる) または表面 (インターフェースから離れていく) と分類される.

研究 の 目的:

  • ポラリトンの新種の近地観測と特徴を報告する:ゴーストフォノンポラリトン.
  • 単軸結晶におけるこれらのゴーストポラリトンの独特の伝播特性とトポロジック移行を調査する.

主な方法:

  • ポラリトン伝播を観察するために,リアルスペースの近地画像実験が実施された.
  • マクスウェルの方程式は非典型の表面波解を記述するために使用された.

主要な成果:

  • ゴーストフォノンポラリトンは平面内ハイパーボリック分散と斜面の大量波面を示している.
  • 波長の低いポラリトンの長距離 (20ミクロメートル以上) の放射状の分散を観測した.
  • 光学軸の角度を制御することによって,帯図の調整を可能にする,ハイパーボリックから円形へのトポロジカルトランジションを実証した.

結論:

  • ゴーストフォノンポラリトンは,双状態の性質 (拡散および消散) を有する新しいポラリトンのクラスを表します.
  • この発見はナノスケールの光を 自然のアニゾトロプの結晶で制御する ユニークな機会を提供します