相关实验视频

Updated: Jun 10, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

在太赫兹区域进行大动态范围光谱测量,基于通过OH1晶体的频率向上转换检测

Jiasheng Yuan¹, Quanxin Guo¹, Xingyu Zhang^1,2

¹Key Laboratory of Laser & Infrared System (Shandong University), Ministry of Education, Qingdao 266237, China.

Sensors (Basel, Switzerland)

|October 16, 2024

概括

这项研究引入了一种具有10 aJ检测灵敏度和七级动态范围的太赫兹光谱系统,使用了一种新型晶体. 该系统准确测量了葡萄糖,并模拟了生物组织吸收光谱.

科学领域:

频谱学是一种光谱学.
特拉赫兹 (THz) 技术的使用.
材料科学是一种材料科学.

背景情况:

太赫兹光谱系统对于材料科学和安全至关重要.
在THz光谱测量中实现高灵敏度和宽动态范围仍然是一个挑战.

研究的目的:

开发一个具有增强检测灵敏度和动态范围的太赫兹光谱系统.
用各种样本类型验证系统的性能.

主要方法:

使用频率上升转换检测方法.
在检测中使用了一种2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 的二甲基环二乙烯基二烯基二烯基二烯基二烯基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基三甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基三甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基二甲基三甲基三甲基二甲基二甲基三甲基三甲基三甲基三甲
用葡萄糖和模拟的生物组织样本测试了系统.

主要成果:

实现了 10 aJ 的检测灵敏度.
演示了高达七个订单的动态范围.
成功地获得了葡萄糖样本的吸收光谱和模拟的生物组织,并且具有很高的准确性.

结论:

开发的太赫兹光谱系统提供了前所未有的灵敏度和动态范围.
该系统对于各种材料的光谱测量是有效的,包括那些与生物应用相关的材料.
这一进步对材料分析和安全查有重大影响.

关键词:

一个OH1晶体.非线性频率转换的非线性频率转换.太赫兹光谱测量测量太赫兹上升转换检测检测器

更多相关视频

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

相关概念视频

IR Frequency Region: Fingerprint Region

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...

IR Frequency Region: X–H Stretching

IR Frequency Region: X–H Stretching

In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of 2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...