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相关概念视频

Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

332
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...
332
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

478
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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相关实验视频

Updated: Sep 11, 2025

Patterning via Optical Saturable Transitions - Fabrication and Characterization
08:19

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Published on: December 11, 2014

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可切换模式转换和光学限制通过带隙调在2D材料中的带隙调.

Sugandh Sirohi, Anindya Ambuj, Prem B Bisht

    Applied optics
    |August 12, 2025
    PubMed
    概括

    研究人员开发了一种基于石墨烯的新型光学模式转换器,可以在Laguerre-Gaussian和Hermite-Gaussian模式之间切换. 该设备使用功能化的石墨烯微镜头和非线性热光学效应来有效操纵光线.

    科学领域:

    • 光学和光学工程的光学和光学工程.
    • 材料科学是一种材料科学.
    • 纳米技术纳米技术

    背景情况:

    • 光学模式转换器对于在各种应用中操纵光束至关重要.
    • 石墨烯表现出独特的非线性光学特性,可以通过功能调整来调整.
    • 开发低功耗,高效的光学设备是光子学的一个关键挑战.

    研究的目的:

    • 为了展示一种新的基于石墨烯的可切换光学模式转换器.
    • 为了实现Laguerre-Gaussian (LG) 和Hermite-Gaussian (HG) 模式之间的转换.
    • 研究功能化石墨烯在非线性光学效应中的作用.

    主要方法:

    • 使用非线性热光学效应在功能化石墨烯中制造微镜头.
    • 使用低功率 (约1mW) 进行设备操作.
    • 基于微镜头作为富里埃转换元件的理论分析.

    主要成果:

    • 成功演示可切换光学模式转换器.
    • 使用功能化石墨烯实现了LG和HG模式之间的转换.
    • 在功能化石墨烯中观察到增强的非线性折射和光学限制反应.
    • 通过从电子捐赠连接体的电荷转移对带隙调整进行了增强.

    更多相关视频

    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

    Published on: September 26, 2014

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    相关实验视频

    Last Updated: Sep 11, 2025

    Patterning via Optical Saturable Transitions - Fabrication and Characterization
    08:19

    Patterning via Optical Saturable Transitions - Fabrication and Characterization

    Published on: December 11, 2014

    6.9K
    Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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    Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

    Published on: September 26, 2014

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    结论:

    • 功能化石墨烯是开发先进光学设备的有希望的材料.
    • 展示的模式转换器在低功耗下有效运行.
    • 石墨烯的非线性热光学效应使得新的光子功能成为可能.