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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Updated: Jan 8, 2026

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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超快的雪崩光二极管超过100 GHz的带宽.

Yang Shi1,2, Mingjie Zou1, Zuhang Li1

  • 1Wuhan National Laboratory for Optoelectronics & School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.

Nature communications
|December 11, 2025
PubMed
概括

研究人员开发了一种新的雪崩光二极管 (APD),使用单重乘载体概念. 这一突破实现了创纪录的105GHz带宽,并提高了高速光通信和传感的灵敏度.

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科学领域:

  • 光电学是指光电子产品.
  • 材料科学 材料科学 材料科学
  • 半导体物理 半导体物理

背景情况:

  • 雪崩光二极管 (APD) 需要具有低电离系数比率 (k) 的材料来实现高速和灵敏的光检测.
  • / (Ge/Si) APD提供CMOS兼容性,但由于 (Ge) 中的双载波倍增,其带宽仅限于几十千兆赫兹.

研究的目的:

  • 通过引入一种新的单个乘法载体概念来克服Ge/Si APD带宽的限制.
  • 为了实现超越当前技术障碍的高速和高灵敏度光检测.

主要方法:

  • 设计了一个分开的吸收-电荷-悬崖-乘法结构.
  • 在薄的Ge区域内设计了一个梯度电场分布.
  • 实现了电子主导载体乘法,并减少了k.

主要成果:

  • 证明了创纪录的高带宽105GHz,增益为7.
  • 启用了8×260 Gb/s的信号接收,这项壮举之前需要无增益探测器.
  • 获得了9dB的灵敏度提高.

结论:

  • 在Ge/SiAPD中,唯一乘数载体概念超越了以前的材料限制.
  • 这一进步使无放大器的光通信,超精确的光学传感和大规模的光学计算成为可能.
  • 开发的APD技术为光电子应用提供了显著的速度和灵敏度改进.