面向超快二维电子光谱的脉冲压缩技术
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北京理工大学光电学院

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0433.5+4

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国家自然科学基金资助项目(U22A6006,62105030)


Pulse Compression Methods for Ultrafast Two-Dimensional Electronic Spectroscopy
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    摘要:

    脉冲压缩是超快二维电子光谱 (2DES) 的关键技术之一,其直接决定了系统的时间分辨率,对研究电子态弛豫、溶剂化与量子相干传能等超快动力学机理有着重要意义。本文系统评述了2DES中常用的脉冲压缩方法:首先介绍了飞秒激光脉冲的时频域特性;随后详细讨论了光栅对、棱镜对、光栅-棱镜组合、脉冲整形器及啁啾镜等脉冲压缩技术的物理机制与局限性;然后结合典型2DES系统,分析了不同系统中的压缩方法选择策略。本文拟系统梳理2DES中的脉冲压缩技术,为发展自主可控的高端超快光谱仪器、推动超快科学等交叉学科领域的发展提供助力。

    Abstract:

    Pulse compression is considered essential for achieving high temporal resolution in two-dimensional electronic spectroscopy (2DES), enabling direct observation of ultrafast phenomena such as electronic relaxation, solvation, and quantum coherent energy transfer. A comprehensive overview of pulse compression techniques commonly employed in 2DES is provided, beginning with the temporal and spectral characteristics of femtosecond laser pulses. The physical principles, benefits, and limitations of widely used compression schemes were examined, including grating pairs, prism pairs, grisms, pulse shapers, and chirped mirrors. Practical considerations for selecting appropriate methods in representative 2DES setups were discussed in detail. By consolidating current methodologies, this work aims to facilitate the development of advanced ultrafast spectroscopy and to support continued progress in the broader field of ultrafast science.

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  • 收稿日期:2025-04-17
  • 最后修改日期:2025-05-19
  • 录用日期:2025-06-03
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