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関連する概念動画

Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

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Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
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Angular Momentum01:21

Angular Momentum

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Angular momentum characterizes an object's rotational motion and is defined as the moment of its linear momentum about a specified point O. When a particle moves along a curved path in the x-y plane, the scalar formulation calculates the magnitude of its angular momentum, utilizing the moment arm (d), representing the perpendicular distance from point O to the line of action of the linear momentum. Despite being scalar in formulation, angular momentum is inherently a vector quantity. Its...
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Conservation of Angular Momentum: Application01:18

Conservation of Angular Momentum: Application

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A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
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Conservation of Angular Momentum01:09

Conservation of Angular Momentum

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A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n tiny particles, the angular momentum of any tiny particle may change, but the system's total angular momentum would remain constant. The principle of conservation of angular momentum only considers the net external torque acting on the system. While there are internal forces exerted by different particles within the system that also produce...
16.4K
Angular Momentum about an Arbitrary Axis01:11

Angular Momentum about an Arbitrary Axis

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Imagine a rigid body with a mass denoted as 'm', which has its center of mass at point G and is rotating around an inertial reference frame. The angular momentum at an arbitrary point P can be calculated by taking the cross product of the position vector and linear momentum vector for each individual mass element.
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
497
Angular Momentum: Rigid Body01:11

Angular Momentum: Rigid Body

16.0K
The total angular momentum of a rigid body can be calculated using the summation of the angular momentum of all the tiny particles rotating in the same plane. Considering all the tiny particles rotating in the x-y plane, the direction of angular momentum of all such particles and that of the rigid body would be perpendicular to the plane of the rotation along the z-axis.
This calculation can get complicated when tiny particles within the rigid body are not rotating in the same plane but have...
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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軌道運動量マイクロレーザー

Pei Miao1, Zhifeng Zhang1, Jingbo Sun1

  • 1Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA.

Science (New York, N.Y.)
|July 30, 2016
PubMed
まとめ
この要約は機械生成です。

研究者は,軌道角運動量 (OAM) 渦のレーザーを生成するマイクロリングレーザーを開発しました. この非ヘルミシアンフォトニクスの突破は,高度な光通信のためのOAMのトポロジカルチャージと極化を正確に制御します.

さらに関連する動画

3D Orbital Tracking in a Modified Two-photon Microscope: An Application to the Tracking of Intracellular Vesicles
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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関連する実験動画

Last Updated: Mar 17, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

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3D Orbital Tracking in a Modified Two-photon Microscope: An Application to the Tracking of Intracellular Vesicles
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3D Orbital Tracking in a Modified Two-photon Microscope: An Application to the Tracking of Intracellular Vesicles

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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科学分野:

  • 光学とフォトニクス
  • 非ヘルミシアン物理学
  • マイクロスケールレーザー

背景:

  • 軌道角運動量 (OAM) を含む構造化された光は,光学における高度な能力を提供します.
  • マイクロ・ナノスケールでのOAMレーザーの生成は,情報容量の増加に不可欠です.
  • 非ヘルミシアンフォトニクスと例外的な点は,光学的デバイスのための新しい設計パラダイムを提供します.

研究 の 目的:

  • シングルモードOAM渦のレーザーを生成できるマイクロリングレーザーを実証する.
  • OAMモードのトポロジカルチャージを正確に制御する.
  • 放射的に偏った渦の放出のための偏振の操作をオンデマンドで可能にします.

主な方法:

  • 非ヘルミシアンフォトニクスの設計原理を例外的に活用する.
  • OAM生成のためのマイクロリングレーザー構造の開発.
  • マイクロレーザー内の偏光制御メカニズムを統合する.

主要な成果:

  • シングルモードOAM渦のレーザーを生成するマイクロリングレーザーの成功実証.
  • 生成されたOAMモードのトポロジカルチャージの正確な制御.
  • 偏振の操作で,放射的に偏振された渦の放出が得られる.

結論:

  • 開発されたOAMマイクロレーザーは,OAM渦束を効果的に生成し,制御します.
  • この技術は,高度な光学機能のための非ヘルミシアンフォトニクスを利用します.
  • 潜在的応用には,量子と古典的な光通信のための次世代の統合された光電子装置が含まれます.