Versatile optical manipulation of trions,dark excitons and biexcitons through contrasting exciton-photon coupling  

作　　者：Zhe Li Xin-Yuan Zhang Rundong Ma Tong Fu Yan Zeng Chong Hu Yufeng Cheng Cheng Wang Yun Wang Yuhua Feng Takashi Taniguchi Kenji Watanabe Ti Wang Xiaoze Liu Hongxing Xu 

机构地区：[1]School of Physics and Technology,Center for Nanoscience and Nanotechnology,and Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education,Wuhan University,430072 Wuhan,China [2]Wuhan University Shenzhen Research Institute,518057 Shenzhen,China [3]Institute of Advanced Synthesis,School of Chemistry and Molecular Engineering,Nanjing Tech University,211816 Nanjing,China [4]International Center for Materials Nanoarchitectonics,National Institute for Materials Science,1-1 Namiki,305-0044 Tsukuba,Japan [5]Research Center for Functional Materials,National Institute for Materials Science,1-1 Namiki,305-0044 Tsukuba,Japan [6]Wuhan Institute of Quantum Technology,430206 Wuhan,China [7]School of Microelectronics,Wuhan University,430072 Wuhan,China [8]Henan Academy of Sciences,450046 Zhengzhou,China

出　　处：《Light(Science & Applications)》2023年第12期2802-2810,共9页光（科学与应用)（英文版）

基　　金：supported by National Key R&D Program of China(Grant No.2021YFA1401100);National Natural Science Foundation of China(NSFC,Grant No.62005202,12074297,62261160386);the Fundamental Research Funds for the Central Universities(No.2042023kf0195);Guangdong Basic and Applied Basic Research Foundation(No.2023A1515011222);China Postdoctoral Science Fund,No.4 Special Funding(Pre-Station)-2022TQ0235;China Postdoctoral Science Fund,No.2 Special Funding(Pre-Station)-2020TQ0234.K.W.;T.T.acknowledge support from JSPS KAKENHI(Grant Numbers 19H05790,20H00354,and 21H05233);A3 Foresight by JSPS.We thank the Core Facility of Wuhan University for the AFM measurements.

摘　　要：Various exciton species in transition metal dichalcogenides(TMDs),such as neutral excitons,trions(charged excitons),dark excitons,and biexcitons,have been individually discovered with distinct light-matter interactions.In terms of valley-spin locked band structures and electron-hole configurations,these exciton species demonstrate flexible control of emission light with degrees of freedom(DOFs)such as intensity,polarization,frequency,and dynamics.However,it remains elusive to fully manipulate different exciton species on demand for practical photonic applications.Here,we investigate the contrasting light-matter interactions to control multiple DOFs of emission light in a hybrid monolayer WSe2-Ag nanowire(NW)structure by taking advantage of various exciton species.These excitons,including trions,dark excitons,and biexcitons,are found to couple independently with propagating surface plasmon polaritons(SPPs)of Ag NW in quite different ways,thanks to the orientations of transition dipoles.Consistent with the simulations,the dark excitons and dark trions show extremely high coupling efficiency with SPPs,while the trions demonstrate directional chiral-coupling features.This study presents a crucial step towards the ultimate goal of exploiting the comprehensive spectrum of TMD excitons for optical information processing and quantum optics.

关 键 词：dynamics COUPLING optics 

分 类 号：O47[理学—半导体物理]