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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Overview of Microscopy Techniques01:22

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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調節可能なトポロジカル・チャージ・ヴォルテックス・マイクロレーザー

Zhifeng Zhang1, Xingdu Qiao1, Bikashkali Midya2

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.

Science (New York, N.Y.)
|May 16, 2020
PubMed
まとめ
この要約は機械生成です。

研究者は非ヘルミシアン対称性破壊を用いた 調節可能な渦のマイクロレーザーを開発しました このキラル光源は,高容量光通信とデータマルチプレキシングのための可変軌道角運動量 (OAM) を提供します.

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科学分野:

  • 光学とフォトニクス
  • 量子情報科学
  • 材料科学

背景:

  • 光束の軌道 Momentum angular (OAM) は,高容量のデータマルチプレクスを可能にします.
  • ダイナミックに調節可能なOAM光源は,OAM調節とマルチプレキシング技術にとって不可欠です.
  • OAM生成のための既存の方法は,しばしばダイナミックな調整性またはスケーラビリティが欠けている.

研究 の 目的:

  • 動的に調節可能なOAM光源を実証する.
  • ヒラルの光放出を制御するための非ヘルミシアン対称性破裂の利用を調査する.
  • 次世代の光通信技術への道を開く

主な方法:

  • 運動量保全の原理を活用する
  • 光学システムでスピン軌道相互作用を利用する.
  • マイクロレーザーの設計で非ヘルミシアン対称性破壊を実装する.
  • 室温で動作する

主要な成果:

  • OAM調節可能な渦巻きマイクロレーザーのデモ.
  • 変数トポロジカルチャージを持つキラル光状態の生成.
  • 標準通信波長で成功しました
  • マルチヴォーテックスの 拡張性のある同時に発生する 概念の証明

結論:

  • 開発されたマイクロレーザーは,柔軟で調節可能なOAM光源を提供します.
  • このアプローチは,高度な光通信システムに新しい経路を提供します.
  • 発見は多次元OAM-スピン-波長分割マルチプレキシングの道を開く.