多毫瓦的平均功率双色空气等离子体太赫兹源在100kHz的重复率
Optics express
|August 13, 2025
概括
研究人员通过将重复率提高到100 kHz,在双色空气等离子体方案中提高了太赫兹 (THz) 生成效率. 这一进步克服了THz光谱测量速度和动态范围的局限性.
科学领域:
- 物理 物理学 物理
- 光学是什么?光学是什么?光学是什么?
- 等离子体物理学的物理学
背景情况:
- 超快的太赫兹 (THz) 瞬态通常使用由低重复率激光驱动的双色空气等离子方案生成,从而限制了测量动态范围.
- 高功率的基于Yb的激光器和非线性时间压缩使THz源的重复率更高,有可能克服以前的限制.
研究的目的:
- 在双色空气等离子体方案中研究重复率缩放对THz生成效率的影响.
- 分析重复率,THz产量和气体密度耗尽之间的相关性.
- 通过开发的一维光电流模型验证实验结果.
主要方法:
- 实验研究了在从1kHz到100kHz的重复率下生成THz.
- 使用干涉计测量,测量了发光区域的气体密度耗尽.
- 开发并应用一维光电流模型用于效率计算.
主要成果:
- 随着重复率的增加,观察到光学到THz转换效率的下降,与气体密度耗尽相关.
- 在100kHz时达到2.8mW的最大平均THz功率和165kV/cm的峰值电场.
- 检测到高达23 THz的THz频率,证实了源的宽带性质.
结论:
- 气体密度耗尽是限制效率扩大在更高的重复率的一个关键因素.
- 两种颜色的空气等离子体方案显示了MHz重复率THz生成的希望.
- 开发的THz源为光谱应用提供了加快的测量时间.
相关概念视频
01:20Atomic Emission Spectroscopy: Overview
2.5K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.5K
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
866
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
866