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関連する概念動画

Light Acquisition02:16

Light Acquisition

8.0K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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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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Channel Rhodopsins01:11

Channel Rhodopsins

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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Photoluminescence: Applications01:14

Photoluminescence: Applications

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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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The Ideal Diode01:15

The Ideal Diode

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A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...
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Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
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Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

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絡み合った発光ダイオード.

C L Salter1, R M Stevenson, I Farrer

  • 1Toshiba Research Europe Limited, 208 Cambridge Science Park, Cambridge CB4 0GZ, UK.

Nature
|June 4, 2010
PubMed
まとめ
この要約は機械生成です。

研究者らは,ライトエミッティングダイオード (LED) の量子ドットを使用して,絡み合った光子ペアの電気駆動源を開発しました. このオンデマンドの絡み合った光子源は,スケーラブルな量子情報アプリケーションにとって極めて重要です.

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FM Dye Cycling at the Synapse: Comparing High Potassium Depolarization, Electrical and Channelrhodopsin Stimulation
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関連する実験動画

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Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
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FM Dye Cycling at the Synapse: Comparing High Potassium Depolarization, Electrical and Channelrhodopsin Stimulation
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科学分野:

  • 量子情報科学とは,量子情報科学である.
  • オプトエレクトロニクス (光電子機器)
  • 固体物理 固体物理学

背景:

  • 従来の量子コンピューティングは,絡み合った光子に依存しているが,電流源 (例えば,パラメトリックダウン変換) は光学的に駆動され,体積が大きく,確率的に制限されている.
  • 既存のソースは確率的放射に苦しんでおり,量子計算操作の成功率とスケーラビリティを妨げています.
  • 絡み合った光子ペアの電気駆動のオンデマンドソースの開発は,実用的な量子コンピューティングの重要な満たされていないニーズです.

研究 の 目的:

  • 絡み合った光子ペアの電気駆動源を実現するために.
  • 絡み合った光子を生成するために半導体量子ドットを使用する可能性を実証する.
  • 量子情報アプリケーションのために開発された絡み合った光子源の性能と信頼性を評価する.

主な方法:

  • 半導体発光ダイオード (LED) 構造の中に量子ドットを統合して,絡み合った発光ダイオード (ELED) を作成します.
  • 直流 (d.c.) と交流流 (a.c.) の両方の電気注入下での絡み合った光子対の放出の特徴.
  • 確立された量子光学測定技術を使用して,エンタグリングフィデリティの定量化.

主要な成果:

  • 絡み合った光子ペアの電気駆動源の実証に成功した.
  • A.C.インジェクションで最大0.82の高いエンタグリングフィデリティを達成しました.
  • このデバイスは,オンデマンドソースとして動作し,複雑なレーザーベースのドライビングシステムの必要性を排除します.

結論:

  • 開発されたエンタングルライトエミッティングダイオード (ELED) は,スケーラブルな量子情報技術に向けた重要な進歩を表しています.
  • 電気注入による高精度エンタグリングフォトン生成は,現在の光源の限界を克服します.
  • ELEDは,将来の量子コンピューティング,量子リレー,およびエンタグレメント交換アプリケーションのための有望なプラットフォームです.