Exciton polaritons based on planar dielectric Si asymmetric nanogratings coupled with J-aggregated dyes film  

作　　者：Zhen CHAI Xiaoyong HU Qihuang GONG 

机构地区：[1]State Key Laboratory for Mesoscopic Physics&Department of Physics,Collaborative Innovation Center of Quantum Matter,Beijing Academy of Quantum Information Sciences,Nano-optoelectronics Frontier Center of Ministry of Education,Peking University,Beijing 100871,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Frontiers of Optoelectronics》2020年第1期4-11,共8页光电子前沿（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2018YFB2200403);the National Natural Science Foundation of China(Grant Nos.61775003,11734001,11527901,and 11804008);the National Postdoctoral Program for Innovative Talents(No.BX201700011);the China Postdoctoral Science Foundation(No.2018M630019);Beijing Municipal Science&Technology Commission(No.Z191100007219001).

摘　　要：Optical cavity polaritons,originated from strong coupling between the excitons in materials and photons in the confined cavities field,have recently emerged as their applications in the high-speed lowpower polaritons devices,low-threshold lasing and so on.However,the traditional exciton polaritons based on metal plasmonic structures or Fabry-Perot cavities suffer from the disadvantages of large intrinsic losses or hard to integrate and nanofabricate.This greatly limits the applications of exciton poalritons.Thus,here we implement a compact low-loss dielectric photonic–organic nanostructure by placing a 2-nm-thick PVA doped with TDBC film on top of a planar Si asymmetric nanogratings to reveal the exciton polaritons modes.We find a distinct anti-crossing dispersion behavior appears with a 117.16 meV Rabi splitting when varying the period of Si nanogratings.Polaritons dispersion and mode anti-crossing behaviors are also observed when considering the independence of the height of Si,width of Si nanowire B,and distance between the two Si nanowires in one period.This work offers an opportunity to realize low-loss novel polaritons applications.

关 键 词：exciton polaritons DIELECTRIC SI ASYMMETRIC nanogratings TDBC J-aggregated DYES FILM 

分 类 号：O47[理学—半导体物理]