Optical resonance with subwavelength spectral coherence switch in open-end cavity  

作　　者：Lipeng Wan David Raveh Tianbao Yu Daomu Zhao Olga Korotkova 

机构地区：[1]School of Physics and Material Science,Nanchang University,Nanchang 330031,China [2]Zhejiang Province Key Laboratory of Quantum Technology and Device,School of Physics,Zhejiang University,Hangzhou 310027,China [3]Leiden Institute of Physics,Leiden University,Leiden 2333CA,The Netherlands [4]Department of Physics,University of Miami,Coral Gables FL 33146,USA

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第7期69-78,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11874321,and 12174338);the Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province(Grant No.20204BCJ22012);the UM for Copper Fellowship support。

摘　　要：The physical properties of light fields at the subwavelength scale have emerged as extensively pursued objectives in nano-optics,photonics,and plasmonics.Here,we report that in the paraxial regime,the spectral density and the spectral axial coherence(z-coherence)structures in a submicron range can be generated by employing a light beam with a suitably chosen spatial coherence state in a counter-propagating configuration,in an open-end cavity.It is established that while the spectral density forms an optical standing wave,the z-coherence state depends on the symmetry of the selected point pair and in particular,the phenomenon termed as periodical coherence switch is found.Our findings shed new light on the discussion of the role of spatial coherence in the photonic cavities,possibly inspiring further studies in the field of enhanced light-nanomaterials interactions by optical cavity.This provides a versatile framework for tailoring coherence in subwavelength space with promising applications in metrology and imaging.

关 键 词：coherence and statistical optics laser beam transmission optical resonators 

分 类 号：O43[机械工程—光学工程]