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関連する概念動画

Photoluminescence: Applications01:14

Photoluminescence: Applications

457
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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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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Photoelectric Effect02:26

Photoelectric Effect

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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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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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モイール光学と光電子

Luojun Du1,2,3, Maciej R Molas4, Zhiheng Huang2,3

  • 1QTF Centre of Excellence, Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150 Espoo, Finland.

Science (New York, N.Y.)
|March 30, 2023
PubMed
まとめ

モイレの超グリッドは 新しい量子物理学と デバイスの応用を可能にします このレビューは,エキソンとテラヘルツ検出を含むモアレ光学と光電子学の進歩を強調しています.

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科学分野:

  • 凝縮物質物理学
  • 量子材料科学
  • フォトニクスと光電子

背景:

  • モイレの超網は人工的な量子材料で 新しい物理を可能にします
  • これらのシステムは 奇妙な電子と光学現象を 探求するためのユニークなプラットフォームを提供します
  • 最近の進歩は,それらの光子と光電子特性に対する重要な関心を刺激しました.

研究 の 目的:

  • 新興モアレフォトニクスと光電子学の最近の進歩をレビューする.
  • モイアエクシトン,ポラリトン,赤外線光反応などの重要な現象を強調する.
  • 将来の研究方向と技術の可能性を議論する.

主な方法:

  • モーレ超網に関する最近の実験的および理論的研究のレビュー
  • エクシトン,ポラリトン,集団刺激を含む現象に注目する.
  • テラヘルツ検出や対称性を破る装置などの光電子アプリケーションの分析.

主要な成果:

  • 新しいモアエ・エクシトン,トリオン,ポラリトンの実証.
  • 共鳴的にハイブリッド化されたエクシトンの観察と再構築された集団的エクシテーション.
  • 強い中と遠赤外線光反応とテラヘルツ単光子検出器の開発.
  • モアールシステムにおける対称性を破る光電子学の探索

結論:

  • モイレの光学と光電子学は,広大な可能性を秘めた急速に進歩する分野です.
  • 将来の研究は,高度な探査技術と新しいモエールシステム (鉄電,磁気) に重点を置くべきである.
  • 外部刺激を用いたモアレの性質の設計は ワクワクする物理学と技術革新を約束します