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相关概念视频

Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

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相关实验视频

Updated: Jul 18, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
11:10

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Published on: May 23, 2018

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基于二氧化瓦纳的焦距可切换的金属.

Junhao Niu, Renfang Tian, Wei Mo

    Applied optics
    |April 3, 2024
    PubMed
    概括

    本研究介绍了一种使用二氧化瓦纳 (VO2) 的可调节金属,具有可切换的焦距. 这种先进的光学设备可以操纵光极化并实现光束聚焦,提供多功能应用.

    科学领域:

    • 光学和光子学 在光学和光子学.
    • 材料科学 材料科学 材料科学
    • 超材料是指一种超材料.

    背景情况:

    • 金属镜头为光束聚焦等应用提供对光相的精确控制.
    • 二氧化瓦纳 (VO2) 具有相位过渡特性,使可调节的光学响应成为可能.

    研究的目的:

    • 设计和演示一个可调节的metalens与可切换的焦距.
    • 为了利用VO2的相位过渡来动态控制光学特性.

    主要方法:

    • 制造一个三层金属结构:金,聚胺和共振环.
    • 使用二氧化瓦纳 (VO2) 进行其温度依赖的相位过渡.
    • 用0.8 THz进行偏振转换和光束聚焦的金属性能的描述.

    主要成果:

    • 金属成功地将发生的x极化波转化为y极化波,效率高.
    • 实现了可切换的焦距为1914微米 (绝缘VO2) 和982微米 (金属VO2).
    • 展示了同时偏振转换和光束聚焦能力.

    结论:

    • 开发的metalens通过通过温度调整VO2相位过渡来提供对焦距的动态控制.

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    Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
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    相关实验视频

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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
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  • 这项技术为需要可切换的聚焦和偏振控制的先进光学系统提供了一个多功能平台.