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相关概念视频

Half wave rectifier01:20

Half wave rectifier

1.6K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
1.6K
Bridge rectifier01:24

Bridge rectifier

823
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
823
Full wave rectifier01:22

Full wave rectifier

1.8K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
1.8K
The Hall Effect01:30

The Hall Effect

2.7K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
2.7K
Voltage Doubler Circuit01:23

Voltage Doubler Circuit

854
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
854
P-N junction01:11

P-N junction

681
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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相关实验视频

Updated: Sep 11, 2025

Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering
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Implementation of a Nonlinear Microscope Based on Stimulated Raman Scattering

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使用SnTe的超宽带非线性霍尔整流器.

Fanrui Hu1, Pengnan Zhao2, Lihuan Yang2

  • 1Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore.

Nature nanotechnology
|August 11, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种超宽带,零偏差整流器,使用在拓晶体绝缘体SnTe薄膜中的非线性霍尔效应. 这项技术可以在广的无线电频率中为自动供电的电子产品提供高效的能源采集.

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Last Updated: Sep 11, 2025

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 电气工程 电气工程

背景情况:

  • 在物联网和6G通信中,自动供电电子产品的扩散需要具有超宽带频率操作和低输入功率灵敏度的整流器.
  • 传统的半导体连接整流器受到寄生电容和值电压的限制,在环境无线电频率条件下阻碍了性能.

研究的目的:

  • 为了引入一款全新的超宽带零偏差整流器.
  • 为了利用拓晶体绝缘体中的非线性霍尔效应,提高整形能力.

主要方法:

  • 面向晶圆尺度 (001) 的拓晶体绝缘体SnTe薄膜的制造.
  • 非线性霍尔效应的表征,包括二次导电性测量.
  • 在广泛的频谱 (23 MHz到1 THz) 中对整形性能进行实验验证.

主要成果:

  • SnTe薄膜具有很大的二次导电性 (~0.004 Ω−1 V−1),这归因于贝里曲率双极.
  • 开发的整流器在23MHz到1THz之间运行,具有高灵敏度 (低至-60dBm),没有外部偏差.
  • 使用收获的无线频率能量,证明了一个热敏电阻的无线供电.

结论:

  • 在SnTe中非线性霍尔效应为开发高效的超宽带整流器提供了一个有前途的途径.
  • 这项技术对下一代能源自主微系统和rectenna应用具有重大潜力.
  • 这些发现为在各种射频条件下运行的先进的自动供电电子设备铺平了道路.