Enhanced trapping properties of coupled plasmonic tweezers via plasmon-exciton interaction

作     者：Jia, Pengxue Shi, Hongyan Xue, Lulu Liu, Ran Yan, Xiaoya Sun, Xiudong 

作者机构：Harbin Inst Technol Sch Phys Harbin 150001 Peoples R China Minist Ind & Informat Technol Key Lab Micronano Optoelect Informat Syst Harbin 150001 Peoples R China Harbin Inst Technol Key Lab Microopt & Photon Technol Heilongjiang Pro Harbin 150001 Peoples R China Shanxi Univ Collaborat Innovat Ctr Extreme Opt Taiyuan 030006 Shanxi Peoples R China 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2024年第32卷第13期

页      面：22377-22387页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [21973023  91950117] 

主　　题：Diffraction limit Finite-difference time-domain method Information processing Quantum communications Quantum information Scanning electron microscopy 

摘      要：Excited plasmonic nanoantennas enable the manipulation of photons coupled with quantum emitters or the trapping of particles as plasmonic tweezers, leveraging the strong evanescent gradient fields at the nanoscale. However, the ohmic loss of metals presents a significant challenge for the stable and high -precision manipulation of nanoparticles without causing damage. In this study, we investigated the enhanced trapping properties induced by plasmon-exciton interaction for coupled plasmonic tweezers. Through the coupling between plasmons and excitons, dynamic particle trapping is achievable under low excitation power conditions of 0.45 mW, with the trapping stiffness increasing by nearly 20 times. Furthermore, the trapping stiffness can be fine-tuned by modulating the quantity of excitons to regulate the coupling strength. Coupled plasmonic tweezers offer an effective strategy to mitigate the influence of ohmic loss on trapping performance, by manipulating particles with minimal laser power. These findings provide insights into enhancing trapping performance through plasmon-exciton coupling, with potential applications in biomedicine and quantum information science. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement