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関連する概念動画

Emission Spectra02:39

Emission Spectra

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When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
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Standing Waves01:17

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Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
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Modes of Standing Waves - I

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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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Sound Waves: Resonance01:14

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Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

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A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
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IR Spectrum Peak Broadening: Hydrogen Bonding01:23

IR Spectrum Peak Broadening: Hydrogen Bonding

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The vibrational frequency of a bond is directly proportional to its bond strength. As a result, stronger bonds vibrate at higher frequencies, while weaker bonds vibrate at lower frequencies. The stretching vibration of the strong O–H bond in alcohols and phenols (very dilute solution or gas phase) appears as a sharp peak at 3600–3650 cm−1.
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Updated: Apr 8, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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ガスや固体から高ハーモニックを連結する.

G Vampa1, T J Hammond1, N Thiré2

  • 1Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.

Nature
|June 26, 2015
PubMed
まとめ

研究者らは,固体亜鉛酸化物で高ハーモニック生成を観察し,一般化された再収束機構を確認した. このブレークスルーにより,アット秒テクノロジーを従来の電子機器と統合することが可能になる.

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関連する実験動画

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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科学分野:

  • 固体物理学 固体物理学とは
  • 量子光学とは,量子光学である.
  • アットセカンド・サイエンス

背景:

  • 原子ガスの高級ハーモニック生成 (HHG) は,一貫した柔らかいX線とアット秒パルスを生成します.
  • 大量結晶のHHGは最近の発展ですが,その根底にある排出メカニズムは不明です.
  • 固体状態のHHGを理解することは,分子軌道イメージングのようなアプリケーションにとって非常に重要です.

研究 の 目的:

  • 固体亜鉛酸化物における高調和生成の支配的なメカニズムを調査する.
  • 固体材料のガス相HHG測定技術を適応する.
  • アットセカンドおよびハイハーモニック技術を従来の電子機器と統合する可能性を調査する.

主な方法:

  • 実験は,中赤外線レーザーフィールド (0.25 V/Å) を使用して,固体亜鉛酸化物で実施されました.
  • ガス相 HHG に通常使用される測定方法は,固体システムに適応されました.
  • HHGプロセスは,第2ハーモニックビームを使用して,放射特性を探査するために変更されました.

主要な成果:

  • 修正されたハーモニックスペクトルは,一般化された電子穴再衝突機構と一致するシグネチャーを示した.
  • 固体HHGは,電子回路の電場と同様の,極めて弱い電場に対して敏感であることが判明しました.
  • この感受性は,電子機器とアトセカンドとハイハーモニックテクノロジーを統合するための経路を示唆しています.

結論:

  • この研究は,固体状態の高調和生成における一般化された再衝突機構を確認している.
  • 弱いフィールドに対する固体HHGの感受性は,ハイブリッド電子アット秒系システムの可能性を開きます.
  • 将来の研究は,これらの発見を,固体帯構造のトモグラフィック再構築に活用することができます.