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Transmission Electron Microscopy01:15

Transmission Electron Microscopy

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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Updated: Dec 17, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

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メタレンス配列ベースの高次元およびマルチフォトン量子源

Lin Li1,2,3,4, Zexuan Liu1,5,6, Xifeng Ren7,8

  • 1National Laboratory of Solid State Microstructures, School of Physics, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China.

Science (New York, N.Y.)
|June 27, 2020
PubMed
まとめ
この要約は機械生成です。

研究者は先端の量子光学技術用のメタレンス配列を用いて 100パスの量子光子源を開発しました この画期的な発見により 量子装置の高次元絡み合いと マルチフォトン生成が可能になりました

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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関連する実験動画

Last Updated: Dec 17, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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科学分野:

  • 量子光学
  • メタ表面技術
  • 統合フォトニクス

背景:

  • 2次元メタ表面は 柔軟な光場操作を量子光学アプリケーションに提供します
  • 既存の量子フォトン源は,スケーラビリティと制御性の限界に直面しています.

研究 の 目的:

  • 拡張可能で制御可能な量子フォトン源を開発する
  • メタ表面を用いた高次元の絡み合いとマルチフォトンの生成を実証する.

主な方法:

  • 非線形結晶とメタレンス配列の統合
  • 自動パラメータダウン変換のための10x10メタレンス配列の製造.
  • 異なる相をメタレンズを使って 絡み合った光子のペアを生成する

主要な成果:

  • 100パスの自発的なパラメトリックダウン変換フォトンペアソースの実証.
  • 高精度 (98.4%, 96.6%, 95.0%) の二,三,四次元二光子経路の絡み合いを達成した.
  • 4フォトンと6フォトンの生成を観測し,高いフォトンの区別がつかない.

結論:

  • 量子フォトンの源は コンパクトで安定し 制御可能です
  • この技術は統合された量子デバイスのための 新しいプラットフォームを提示します
  • 高次元の絡み合いとマルチフォトン状態の生成を可能にします.