用于超快泵浦-探测光谱技术的异步光学采样(特邀)  

Asynchronous Optical Sampling for Ultrafast Pump⁃Probe Spectroscopy(Invited)

作　　者：滕晓丹 柏汉泽 李权明 麦海静 玄洪文 Teng Xiaodan;Bai Hanze;Li Quanming;Mai Haijing;Xuan Hongwen(GBA Branch of Aerospace Information Research Institute,Guangzhou 510700,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]广东大湾区空天信息研究院,广东广州510700 [2]中国科学院大学,北京100049

出　　处：《光学学报》2024年第17期149-160,共12页Acta Optica Sinica

基　　金：中国科学院空天信息创新研究院(E2Z2D101,E1Z1D101);中国科学院人才引进计划(E33310030D)。

摘　　要：异步光学采样(ASOPS)泵浦-探测光谱技术作为一种具有飞秒时间分辨的超快测量技术,能够快速捕捉超快动力学现象,是研究微观粒子行为的有力工具。对传统ASOPS的基本原理、系统组成展开具体分析,并着重讨论了该系统搭建的技术细节,总结了近年来传统ASOPS的研究与发展,最后展望了基于ASOPS的泵浦-探测光谱技术。Significance Asynchronous optical sampling(ASOPS)based on pump-probe spectroscopy is a powerful technique for ultrafast optical measurements.It leverages linear scanning between different pulse sequences of dual-comb lasers to enable equivalent sampling of pump pulse signals by delayed probe pulses.This allows for the observation of transient responses in samples on a femtosecond or even sub-femtosecond scale.Traditional electronic systems are limited by the bandwidth of detector circuits,rendering them unable to directly detect instantaneous processes on picosecond or femtosecond time scale.Optical sampling technology overcomes this limitation by converting temporal resolution to spatial resolution,significantly expanding the effective bandwidth for sampling ultrafast processes.By utilizing equivalent sampling on ultrafast time scales,it reconstructs signals bypassing the limitations of electronic detection bandwidth,providing a simple and effective method for studying photoinduced transient properties of materials,such as carrier dynamics,surface acoustics,and ultrafast magnetodynamics.In addition,with scanning rates up to the kHz range,ASOPS pump-probe spectroscopy translates ultrafast behavior into a series of frames observable by humans,facilitating detailed analysis.Compared to other microscale spectroscopy techniques,such as electron spectroscopy,high-energy X-ray technology,and particle scattering spectroscopy,pump-probe spectroscopy requires less stringent experimental environments and sample preparation,making it a widely used in fields like femtosecond chemistry,physics,and biology.Progress Conventional ASOPS requires sampling across the entire pump pulse cycle,typically resulting in window lengths of nanoseconds.Although different transient processes require different time windows,most only need one or two hundred picoseconds to meet observation requirements,leading to a low duty cycle and a significant portion of irrelevant acquired data.Furthermore,the timing jitter caused by the laser drift of repe

关 键 词：异步光学采样 泵浦-探测光谱技术 飞秒时间分辨 超快动力学 

分 类 号：O439[机械工程—光学工程] TN249[理学—光学]