摘要
随着X射线光源的进步和量子光学的发展,形成了X射线量子光学这一前沿分支学科.原子内壳层跃迁是重要的X射线量子光学体系,它具有跃迁种类丰富和表征手段多样、覆盖波段范围宽等优势.但内壳层空穴的自然线宽较宽且受局域电子结构影响,使得实验上缺乏纯粹的二能级跃迁,成了制约X射线量子光学发展的瓶颈之一.本文利用共振非弹性X射线散射技术,在实验上分离了WSi_(2)中W-L_(3)边的白线,从而为基于原子内壳层跃迁的X射线量子光学体系提供了二能级方案,也为这一领域的发展提供了强有力的实验技术支持.
With the advancement of synchrotron and free-electron laser,X-ray quantum optics has emerged as a novel frontier for exploring light-matter interactions at high photon energies.A significant challenge in this field is achieving well-defined two-level systems through atomic inner-shell transitions,which are often hindered by broad natural linewidths and local electronic structure effects.This study aims to explore the potential of tungsten disilicide(WSi_(2))as a two-level system for X-ray quantum optics applications.Utilizing high-resolution resonant inelastic X-ray scattering(RIXS)near the W-L_(3) edge,in this work,the white line of bulk WSi_(2) is experimentally distinguished,overcoming the spectral broadening caused by short core-hole lifetime.The measurements are conducted by using a von Hamos spectrometer at the GALAXIES beamline of the SOLEIL synchrotron.The results reveal a single resonant emission feature with a fixed energy transfer,confirming the presence of a discrete 2p-5d transition characteristic of a two-level system.Additional high-resolution XAS spectra,obtained via high energy resolution fluorescence detection method and reconstructed from off-resonant emission(free from self-absorption effect for bulk WSi_(2) sample)method,further support the identification of a sharp white line.These findings demonstrate the feasibility of using WSi_(2) as a model system in X-ray cavity quantum optics and establish RIXS as a powerful technique to resolve fine inner-shell structures.
作者
赵喆芊
汪书兴
王希源
苏洋
马子茹
黄新朝
朱林繁
ZHAO Zheqian;WANG Shuxing;WANG Xiyuan;SU Yang;MA Ziru;HUANG Xinchao;ZHU Linfan(Hefei National Research Center for Physical Sciences at the Microscale,Department of Mordern Physics,University of Science and Technology of China,Hefei 230026,China;I.Physikalisches Institut,Justus-Liebig-Universität Gießen and Helmholtz Forschungsakademie Hessen für FAIR(HFHF),Campus Gießen,GSI Helmholtzzentrum für Schwerionenforschung,Gießen 35392,Germany;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621999,China;FXE instrument,European XFEL,Schenefeld 22869,Germany)
出处
《物理学报》
北大核心
2025年第18期124-131,共8页
Acta Physica Sinica
基金
SOLEIL光源批准的用户实验(批准号:20220927)
国家自然科学基金(批准号:12404313,12334010)
欧洲自由电子激光HELIOS项目资助的课题.
关键词
X射线量子光学
内壳层跃迁
共振非弹性X射线散射
二能级
X-ray quantum optics
inner-shell transition
resonant inelastic X-ray scattering
two-level system
