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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

998
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...
998
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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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...
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相关实验视频

Updated: Jan 9, 2026

Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
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时间隔离的拉曼光谱使用3D堆叠的背面照亮的CMOS SPAD阵列.

Gillian E Brown, Andrew B Matheson, Yuanyuan Hua

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    此摘要是机器生成的。

    这项研究展示了一种新的背面照明 (BSI) 单光子雪崩二极管 (SPAD) 阵列,用于时间分辨率拉曼光谱. 阿特拉斯传感器实现了高计数率和精确的定时,使微秒光谱峰值观测成为可能.

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    科学领域:

    • 光子学和光谱成像技术
    • 先进的半导体设备 半导体设备
    • 这是一种CMOS传感器技术.

    背景情况:

    • 单光子雪崩二极管 (SPAD) 对于低光成像至关重要.
    • 背面照明 (BSI) 技术提高了光检测效率.
    • 时间分辨率传感对于光谱应用至关重要.

    研究的目的:

    • 为了描述Atlas BSI SPAD阵列的时间响应.
    • 展示BSI SPAD数组首次用于时间解析拉曼光谱的使用.
    • 评估用于光谱应用的Atlas传感器的性能.

    主要方法:

    • 描述128x128 BSI SPAD阵列的时间响应.
    • 使用阿特拉斯传感器实现时间分辨率拉曼光谱.
    • 与前侧照明的SPAD阵列 (RaII) 的性能比较.

    主要成果:

    • 实现了1.44 ns (FWHM) 的平均时间分辨率和~153 ps的时间偏移.
    • 与RaII传感器相比,计数速度得到了10.7倍的改善.
    • 成功检测了微秒曝光的拉曼光谱峰值.

    结论:

    • 阿特拉斯BSI SPAD阵列在光谱学方面具有显著的优势.
    • 3D堆叠的BSI CMOS技术可以实现高性能时间分辨率传感.
    • 这项工作为先进的光谱成像应用铺平了道路.