摘要
原子时间成像开辟了微观(分子/原子)动力学研究的新时代。在原子水平上,物理学、化学和生物学的研究是统一的,都是研究原子的运动和原子态的变化。原子时间成像只能是全光成像,利用光的两重性(既是信息载体,又是研究资源)记录瞬变动态过程(事件)调制的光场信息。本文对原子时间成像的基本原理、最佳成像系统及其成像的典型技术进行评述。目前已利用多级光参量放大闲频光(直接)成像技术,记录了有效成像频率为40×10^(12) frame/s的高空间分辨率等离子体光栅演变过程。
Significance Observing light information during atomic time processes to accurately reveal the physical,chemical,and biological phenomena and their evolution during atomic motion has always been a dream of scientists.Atomic time imaging with the sound intrinsic spatial resolution is applicable to studying ultrafast transient events in ultrafast physics,ultrafast chemistry,and ultrafast biology.The events include ultrafast optophysical processes in semiconductor and quantum well microstructures,excitation of excitons and carriers by light,high-order harmonic effects,ultrafast dynamic processes in condensed matter,ultrahigh-intensity laser wake field acceleration,formation and breaking of chemical bonds,transfer of protons and electrons,the influence of molecular vibrations and rotations on chemical reactions,energy transfer processes in photosynthesis,photoisomerization processes in visual systems,and charge and proton transfer in DNA.Currently,only all-optical imaging can be employed to achieve atomic time imaging,where light itself records the modulated light field of transient events or dynamic processes.This is based on the duality of light as both an information carrier and a research resource.From the perspective of the light field,the amplitude,phase,wavelength,wave vector,and polarization of the light field are included.From the perspective of photons,photon energy,momentum,spin angular momentum,orbital angular momentum,and nonlinear and quantum properties of photons are contained.Progress Ultrafast atomic time imaging has seen significant developments in recent years.In femtosecond holographic imaging,Dr.Martin Centurion was the first to achieve multi-frame encoded femtosecond time-domain holography(Fig.5),while Dr.N.H.Matlisi first utilized chirped pulses and spectral interferometry to record the frequency-domain holography of laser-induced plasma wake fields(Fig.6).In scanning streak tube compressed ultrafast photography(CUP),Gao et al.proposed the CUP technique to achieve two-dimensional imaging of non
作者
李景镇
蔡懿
曾选科
陆小微
陈红艺
徐世祥
朱启凡
朱永乐
Li Jingzhen;Cai Yi;Zeng Xuanke;Lu Xiaowei;Chen Hongyi;Xu Shixiang;Zhu Qifan;Zhu Yongle(College of Physics and Optoelectronic Engineering,Institute of Photonic Engineering,Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,State Key Laboratory of Radio Frequency Heterogeneous Integration,Shenzhen University,Shenzhen 518060,Guangdong,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2024年第17期73-89,共17页
Acta Optica Sinica
基金
国家自然科学基金国家重大科研仪器研制项目(61827815)
国家自然科学基金(92050203,62275163,12174264,62075138)
国家重点研发计划(2023YFA1608504)
广东省自然科学基金(2021A1515011909,2022A1515011457,2024A1515010437,2024A1515011948)
深圳市科技计划项目(JCYJ20210324095213037)。
关键词
极高速成像
原子时间成像
分幅频率
分幅时间
曝光时间
时间分辨率
本征空间分辨率
时间信息质量因子
空间信息混淆比
ultrafast imaging
atomic time imaging
framing frequency
framing time
exposure time
temporal resolution
intrinsic spatial resolution
time information quality factor
spatial information confusion ratio
