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相关概念视频

Photoelectric Effect02:26

Photoelectric Effect

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...
Photoluminescence: Applications01:14

Photoluminescence: Applications

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 11, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

光子工程. 光子工程. 阿弗罗狄蒂的虹色是因为她的虹色.

A R Parker1, R C McPhedran, D R McKenzie

  • 1Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.

Nature
|May 9, 2001
PubMed
概括

海老鼠的脊椎由于其独特的结构而表现出惊人的虹彩,以100%的反射率反映出整个可见光谱. 这种自然光子工程展示了大自然先进的光学能力.

科学领域:

  • 生物光子学 生物光子学
  • 结构色调 结构色调
  • 海洋生物学 海洋生物学

背景情况:

  • 强烈的自然颜色来自多层反射器或衍射网格.
  • 海鼠 (Aphrodita sp.) 是一种海鼠. 显示了显著的虹彩.
  • 聚合物化物具有复杂的外部结构.

研究的目的:

  • 研究海老鼠notoseta的虹彩.
  • 了解其变色特性的结构基础.
  • 分析生物体使用的光子工程原理.

主要方法:

  • 对海老鼠的显微镜检查 notoseta.
  • 光学分析光反射和颜色特性.
  • 脊柱结构的结构分析.

主要成果:

  • 在正常光线下,notoseta表现出深红色的色彩.
  • 在特定的光发射下,不同的颜色的条纹沿脊柱轴出现.
  • 该结构反映了整个可见光谱,在某些角度有100%的反射率.

结论:

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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相关实验视频

Last Updated: May 11, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

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

Published on: September 5, 2019

  • 海老鼠notoseta是一种天然的光子晶体.
  • 它的简单结构实现了复杂的光学效果,证明了生物光子工程.
  • 这一发现提供了对自然结构色彩和仿生设计的见解.