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

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of motion,...
Law of Rational Indices01:29

Law of Rational Indices

The Law of rational indices is a fundamental principle in the field of crystallography. According to this law, the intercepts of a crystal face along the crystallographic axes (the three-dimensional axes along which a crystal is measured) can be expressed as either equivalent to the unit intercepts (a, b, c) or simple whole number multiples of them. These multiples are typically denoted as na, n'b, and n''c, where n, n', and n'' are simple whole numbers.To illustrate, consider a crystal with...
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
Indeterminate Products01:29

Indeterminate Products

Indeterminate forms also arise in the evaluation of limits involving products, particularly when one factor approaches zero while the other tends to positive or negative infinity. This situation, commonly described as a zero-times-infinity form, does not have an immediately interpretable outcome. Depending on how the factors behave relative to one another, the limit of such a product may be zero, infinite, or a finite nonzero value.Product Limits and Algebraic RewritingTo analyze limits of this...
Transformations of Functions III01:20

Transformations of Functions III

Transformations modify the graphical representation of a function without changing its fundamental form. One common transformation is reflection, which flips the graph across a designated axis. When the vertical coordinates of all points are multiplied by the negative one, the entire graph is mirrored over the horizontal axis. This transformation reverses the vertical orientation of peaks and troughs, akin to signal inversion in electrical systems, where a waveform is flipped, but the timing of...
Trigonometric Identities III01:27

Trigonometric Identities III

Cofunction identities are a key concept in trigonometry. They describe how trigonometric functions relate when their input angles are complementary — meaning the angles add up to 90°. On the unit circle, every angle θ— measured counterclockwise from the positive x-axis — corresponds to a point with coordinates (cos⁡ θ, sin ⁡θ). These values represent the horizontal and vertical components of the terminal side of the angle.If the same point on the unit circle is instead described using the...

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

Nonlinear nanophotonics for high-dimensional quantum states.

Light, science & applications·2026
Same author

Mixing of Surface and Bulk Optical Nonlinearities via Surface Plasmon Polaritons.

Physical review letters·2025
Same author

Near-field photon entanglement in total angular momentum.

Nature·2025
Same author

Four-dimensional conserved topological charge vectors in plasmonic quasicrystals.

Science (New York, N.Y.)·2025
Same author

Dynamic control and manipulation of near-fields using direct feedback.

Light, science & applications·2024
Same author

Nanoscale optical nonreciprocity with nonlinear metasurfaces.

Nature communications·2024

関連する実験動画

Updated: May 26, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

否定的な屈折指数を持つ3次元光学メタマテリアル.

Jason Valentine1, Shuang Zhang, Thomas Zentgraf

  • 1NSF Nano-scale Science and Engineering Center (NSEC), 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA.

Nature
|August 12, 2008
PubMed
まとめ

研究者らは,陰性折射率の3D光学超材料を開発し,光学周波数の以前の制限を克服しました. このブレークスルーにより,新しい光学デバイスと現象が可能になり,高度なアプリケーションのための低損失と幅広いスペクトル範囲を提供します.

さらに関連する動画

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data
06:36

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

関連する実験動画

Last Updated: May 26, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data
06:36

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

科学分野:

  • * メタマテリアルとナノフォトニック
  • * 光学とフォトニック
  • * マテリアルサイエンス・サイエンス

背景:

  • * メタマテリアルには,自然界では見られない,負の屈折指数などのユニークな特性があります.
  • * Negative-index metamaterials (NIMs) は以前は,製造上の課題と高い損失のため,マイクロ波周波数または光学周波数の光学的に薄いサンプルに限定されていました.
  • * 低損失で大量の3次元 (3D) オプティカルNIMを実現することは,大きな障害となっています.

研究 の 目的:

  • * 光学周波数で陰性折射率を示す3D光学メタマテリアルを設計する.
  • * 大量光学アプリケーションの薄膜および2Dメタマテリアルの限界を克服するために.
  • * 実用的な光学装置の高値 (低損失) を実証する.

主な方法:

  • *3Dメタマテリアルを作るためのカスケード"漁網"構造の製造.
  • * 幅広いスペクトル範囲におけるメタマテリアルの光学特性の特徴.
  • * 実験的に否定的屈折を証明するために,元材料からプリズマの構築.

主要な成果:

  • * 負の屈折指数を持つ3D光学メタマテリアルの実現.
  • * エネルギー消耗が低いことを示す3.5の高いメリット数値を達成しました.
  • * プリズマ構成における負相進化を介して否定的屈折を明確に示した.
  • * 負の指数は,幅広いスペクトル範囲で観察されました.

結論:

  • *開発された3D光学メタマテリアルは,低損失の光学周波数で負の屈折率を達成することに成功しました.
  • *この突破は,機能的な光学デバイスの作成を可能にし,新しい3D光学効果の探索の道を開きます.
  • *潜在的応用には,スーパーレンズ,光学トンネル,および高度に方向性のある源が含まれます.