Enhanced amplified spontaneous emission via splitted strong coupling mode in large-area plasmonic cone lattices  

作　　者：Jiazhi Yuan Jiang Hu Yan Zheng Hao Wei Jiamin Xiao Yi Wang Xuchao Zhao Ye Xiang Yong Lei Wenxin Wang 

机构地区：[1]Qingdao Innovation and Development Center of Harbin Engineering University,Harbin Engineering University,Qingdao 266500,China [2]College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China [3]College of Material Sciences and Chemical Engineering,Harbin Engineering University,Harbin 150001,China [4]Institute of Physics,Department of Mathematics and Natural Sciences,TU Ilmenau,Ilmenau 98693,Germany [5]College for Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

出　　处：《Opto-Electronic Science》2025年第2期16-24,共9页光电科学(英文)

基　　金：financial supports from National Natural Science Foundation of China(No.61905051);Natural Science Foundation of Heilongjiang Province(No.LH2020F027).

摘　　要：Periodic metal nanoarrays serving as cavities can support directional-tunable amplified spontaneous emission that goes beyond the diffraction limit due to the hybrid states of surface plasmons and Bloch surface waves.Most of these modes'interactions remain within the weak coupling regime,yet strong coupling is also anticipated to occur.In this work,we present an intriguing case of amplified spontaneous emission(ASE),amplified by the splitting upper polariton mode within a strong coupling system,stemming from a square lattice of plasmonic cone lattices(PCLs).The PCLs are fabricated using an anodized aluminum oxide membrane(AAO),which facilitates strong coupling between surface plasmons and Bloch surface wave modes,with the maximum Rabi splitting observed at 0.258 eV for the sample with an aspect ratio of 0.33.A 13.5-fold increase in amplified spontaneous emission is recorded when the emission from Nile Red coincides with this flat energy branch of upper polariton,which exhibits a high photon density of states.Reduced group velocity can prolong photon lifetime and boost the probability of light-matter interaction.The observed ASE phenomenon in this strong coupling plasmonic system widens the scope for applications in nanolasing and polariton lasing.

关 键 词：strong coupling nanocone array surface plasmon polariton localized surface plasmon amplified spontaneous emission 

分 类 号：O41[理学—理论物理]