Optical scattering imaging with sub-nanometer precision based on position-ultra-sensitive giant Lamb shift  

作　　者：Zeyang Liao Yu-Wei Lu Wei Li Xue-Hua Wang 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics,Sun Yat-sen University,Guangzhou 510275,China [2]Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area(Guangdong),Shenzhen 518045,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第6期96-105,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFA1400800);the Key-Area Research and Development Program of Guangdong Province(Grant No.2018B030329001);the Guangdong Special Support Program(Grant No.2019JC05X397);the Natural Science Foundation of Guangdong(Grant Nos.2021A1515010039;2018A030313722)。

摘　　要：The Lamb shift of a quantum emitter in close proximity to a plasmonic nanostructure can be three or more orders of magnitude larger than that in the free space and is ultra-sensitive to the emitter position and polarization.We demonstrate that this large Lamb shift can be sensitively observed from the scattering or absorption spectrum dip shift of the coupled system when the plasmonic nanoparticle or tip scans the emitter.Using these observations,we propose a scanning optical scattering imaging method based on the plasmonic-enhanced Lamb shift with achieves sub-nanometer resolution.Our method is based on the scattering or absorption spectrum of the plasmon-emitter coupling system,which is free of the fluorescence quenching problem and easier to implement in a plasmon-emitter coupling system.In addition,our scheme works even if the quantum emitter is slightly below the dielectric surface,which can bring about broader applications,such as detecting atoms and molecules or quantum dots above or under a surface.

关 键 词：Lamb shift PLASMON optical scattering imaging 

分 类 号：O436.2[机械工程—光学工程] TP391.41[理学—光学]