Effect of spatially nonlocal versus local optical response of a gold nanorod on modification of the spontaneous emission

作     者：Sha-Sha Wen Meng Tian Hong Yang Su-Jun Xie Xiao-Yun Wang Yun Li Jie Liu Jin-Zhang Peng Ke Deng He-Ping Zhao Yong-Gang Huang 文莎莎;田锰;杨红;谢素君;王小云;李芸;刘杰;彭金璋;邓科;赵鹤平;黄勇刚

作者机构：College of PhysicsMechanical and Electrical Engineering Jishou UniversityJishou 416000China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第2期

页      面：520-528页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11964010,11564013 and 11464014) the Natural Science Foundation of Hunan Province(Grant No.2020JJ4495) the Scientific Research Fund of Hunan Provincial Education Department,China(Grant No.18C0558) the Hunan Provincial Innovation Foundation for Postgraduate,China(Grant Nos.CX2018B706 and CX20190876) 

主　　题：spatially nonlocal response hydrodynamics spontaneous emission rate gold nanorod 

摘      要：The spontaneous emission rate of a two-level quantum emitter(QE)near a gold nanorod is numerically *** different optical response models for the free-electron gas are adopted,including the classical Drude local response approximation,the nonlocal hydrodynamic model,and the generalized nonlocal optical response *** optical response leads to a blueshift and a reduction in the enhancement of the spontaneous emission *** all the three models,the resonance frequency is largely determined by the aspect ratio(the ratio of the nanorod length to the radius)and increases sharply with decreasing aspect *** nanorod with a fixed length,it is found that the larger the radius is,the higher the resonance frequency is,and the smaller the enhancement ***,if the length of the nanorod increases,the peak frequency falls sharply,while the spontaneous emission enhancement grows *** nanorod with a fixed aspect ratio,the peak frequency decreases slowly with increasing nanorod *** nanorod shows smaller nonlocal *** a certain frequency,there is an optimal size to maximize the enhancement of the spontaneous emission *** order modes are more affected by the nonlocal smearing of the induced charges,leading to larger blueshift and greater reduction in the *** results should be significant for investigating the spontaneous emission rate of a QE around a gold nanorod.