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関連する概念動画

Oscillations about an Equilibrium Position01:04

Oscillations about an Equilibrium Position

Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so because...
Damped Oscillations01:07

Damped Oscillations

In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
Forced Oscillations01:06

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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:
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...

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Updated: May 12, 2026

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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垂直の三重微小穴におけるパラメトリック振動

C Diederichs1, J Tignon, G Dasbach

  • 1Laboratoire Pierre Aigrain, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France.

Nature
|April 14, 2006
PubMed
まとめ
この要約は機械生成です。

研究者らは,単体半導体三重マイクロキャビティでのパラメトリック振動を実証し,絡み合った光子の効率的な生成を可能にしました. このブレークスルーは,量子情報技術のコンパクトでアラインメントフリーなソースへの道を開く.

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Last Updated: May 12, 2026

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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科学分野:

  • 非線形光学とは,非線形光学である.
  • 量子光学とは,量子光学である.
  • 半導体ナノフォトニック

背景:

  • 光学パラメトリック振動器 (OPO) は,非線形プロセスを通して新しい周波数を生成します.
  • 現在のOPOは,大量の非線形結晶と外部空洞を使用することが多く,統合を制限しています.
  • 効率的なOPOは,暗号化や絡み合った光子生成などの量子情報アプリケーションに不可欠です.

研究 の 目的:

  • 単体半導体マイクロキャビティにおけるパラメトリック振動を実証する.
  • 量子光学のためのアラインメントフリーで統合されたソースを開発する.
  • 電気的にポンプされた半導体パラメトリック振動器の可能性を調査する.

主な方法:

  • 単体半導体トリプルマイクロキャビティの製造.
  • パラメトリック振動の垂直波伝達を活用する.
  • ナノ構造内の信号,アイドル,ポンプ波の相互作用の特徴.

主要な成果:

  • 半導体マイクロキャビティにおけるパラメトリック振動の実証に成功した.
  • 絡み合った光子ペアの生成の可能性のある信号とアイドル波の生成.
  • 低ポンプの値強度を達成し,電気ポンプの実現可能性を示しています.

結論:

  • 単体半導体マイクロキャビティは,統合パラメトリック振動器のための有望なプラットフォームを提供します.
  • このアプローチは,量子アプリケーションのアラインメントフリー操作と効率的なカップリングを可能にします.
  • この結果は,量子情報処理のための電気的にポンプされたコンパクトな源への道を示唆しています.