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相关概念视频

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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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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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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相关实验视频

Updated: May 1, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

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超紧型和多功能集成光子平台.

Zhuochen Du1, Kun Liao1, Tianxiang Dai1

  • 1State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Beijing Academy of Quantum Information Sciences, Nano-optoelectronics Frontier Center of Ministry of Education, Peking University, Beijing 100871, China.

Science advances
|June 19, 2024
PubMed
概括

研究人员使用反向设计开发了一个超紧的多功能集成光子平台. 这种紧的平台能够实现先进的光学信息处理,并在复杂的模型和手写数字分类任务中表现出高保真性.

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相关实验视频

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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科学领域:

  • 光子学和光学工程 光子学和光学工程
  • 集成光学 集成光学 集成光学
  • 计算物理 计算物理

背景情况:

  • 多功能集成光子平台对于光学信息处理至关重要.
  • 由于集成挑战,当前的平台往往需要很大的足迹.
  • 实现小型化是推动光子技术发展的关键.

研究的目的:

  • 实现一个具有超紧足迹的多功能集成光子平台.
  • 为了证明平台对复杂的计算任务的能力.
  • 为实现超小型集成光子平台提供一种有效的方法.

主要方法:

  • 利用反向设计创建一个紧的光子平台.
  • 集成86个反向设计的合器和91个相位变换器.
  • 实现了一个维的Floquet Su-Schrieffer-Heifer和Aubry-André-Harper模型.

主要成果:

  • 实现了一个超紧的光子平台 (3毫米×0.2毫米),比以前的设计要小得多.
  • 在Su-Schrieffer-Heeger (97.90%) 和奥布里-安德烈-哈珀 (99.34%) 模型中表现出高保真度.
  • 使用芯片上训练成功执行了手写数字分类任务,准确率为87%.

结论:

  • 反向设计方法可以创建超小的,多功能集成光子平台.
  • 开发的平台是可扩展的,能够执行复杂的计算任务.
  • 这项工作在缩小光子集成电路方面取得了重大进展.