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相关概念视频

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

296
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
296
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

215
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...
215

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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宽带模式交换器基于次波长Y连接点的宽带模式交换器.

Raquel Fernández de Cabo1, Alejandro Sánchez-Sánchez2, Yijun Yang3

  • 1Instituto de Óptica, Consejo Superior de Investigaciones Científicas (CSIC), 28006 Madrid, Spain.

Nanophotonics (Berlin, Germany)
|December 5, 2024
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概括

这项研究介绍了一种新的光子模式交换器,使用次波长网格来增强芯片上的光学互连. 它实现了宽带宽,低损耗和低交叉声,这对于先进的光子应用至关重要.

关键词:
反向设计优化反向设计优化模式转换模式的转换方式多模式多模模式光子学是一种光子学.小波长网格的子波长网格.有对称的Y结.

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科学领域:

  • 光子学 是一个光子学.
  • 纳米技术 纳米技术
  • 光学工程是指光学工程.

背景情况:

  • 多模光子学,使用模分复合,增强大规模系统的光学互连能力.
  • 应用范围包括电信,数据通信,量子和非线性光子学.
  • 紧,低损耗,低交叉声率的多模式设备对于芯片上模式操纵至关重要.

研究的目的:

  • 推出一种新的,紧的模式交换器,用于有效的芯片上模式操纵.
  • 为了提高性能,利用亚波长格子元材料和Y交叉点来提高性能.
  • 为了在一个小的足迹中实现宽带宽,低损耗和低交叉通话.

主要方法:

  • 设计和制造一种模式交换器,使用波长下格子 (SWG) 的元材料和对称的Y连接点.
  • 集成SWG纳米结构,以精确控制传播常数.
  • 分散工程扩大运营带宽.

主要成果:

  • 展示了一个紧的设备 (6.5μm × 2.6μm) 具有低损失和交叉声.
  • 实现了迄今为止报告的最广泛的操作带宽,从1420nm到1620nm.
  • 测量损失低至0.5dB和灭绝比>10dB在整个频段,增强性能 (<0.4dB损失,>18dB灭绝比) 在149nm带宽.

结论:

  • 新型模式交换器为芯片上的光学互连提供了显著的进步.
  • 该设计允许精确的模式操纵,具有卓越的性能指标.
  • 这项技术对于在各种应用中扩展未来光子系统至关重要.