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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

450
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
450
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

455
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
455

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相关实验视频

Updated: Jul 19, 2025

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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网格合波导增强拉曼传感器传感器.

Mohamed A Ettabib1, Bethany M Bowden2, Zhen Liu1

  • 1Zepler Institute for Photonics and Nanoelectronics, University of Southampton, Southampton, United Kingdom.

PloS one
|August 10, 2023
PubMed
概括
此摘要是机器生成的。

我们开发了一个波导增强的拉曼光谱 (WERS) 平台,使用对齐耐受格合器. 该系统简化了WERS设备,并提高了用于化学分析的拉曼信号效率.

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Last Updated: Jul 19, 2025

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 频谱学是一种光谱学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 波导增强拉曼光谱 (WERS) 为化学检测提供了高灵敏度.
  • 传统的WERS系统通常需要精确的光学对齐,这限制了它们的实际应用.
  • 开发对齐耐受性合方法对于强大且易于使用的WERS设备至关重要.

研究的目的:

  • 介绍一个新的WERS平台,其中包含了对齐耐受的芯片下网格输入合器.
  • 使用氧化波导和醇分析剂来演示平台的功能.
  • 评价格网格合器在对齐耐受性和效率方面提供的性能增强.

主要方法:

  • 一个100纳米厚的平面氧化 (Ta2O5) 波导的制造.
  • 集成下芯片格合器用于简化输入合.
  • 使用醇 (BnOH) 和其化形式 (d7-BnOH) 作为拉曼光谱的参考分析物.
  • 拉曼振动转移的表征用于校准目的.

主要成果:

  • 已成功实施了WERS的对齐耐受格合器.
  • 实现了改进的翻译对齐容忍度,有利于一次性WERS芯片.
  • 观察到BnOH和d7-BnOH之间的显著拉曼振动线移位,适合系统校准.
  • 报告说,由于格子合器设计,拉曼转换效率提高.

结论:

  • 开发的带有网格合器的WERS平台为拉曼光谱学提供了简化和更强大的方法.
  • 使用BnOH和d7-BnOH为校准WERS系统提供了一个实用的方法.
  • 该平台显示了进一步性能改进和化学传感领域更广泛应用的潜力.