摘要
Strong light-matter interactions in two-dimensional transition metal dichalcogenides(TMDCs)with robust spin-valley degrees of freedom open up the prospect of valleytronic devices.A thorough understanding on the dynamics of the valley polarizations in the strong coupling regime is urgently required.Here,multiple polarized TMDCs-SPPs hybrid systems were constructed by combining monolayer WS_(2)flakes to linear,circular,and spiral Ag gratings,resulting in linear and circular polarized modula-tion on the coherent hybrid states,respectively.Particularly,valley polaritons can be tailored asymmetrically by chiral strong coupling regime.Furthermore,the dynamics of the polarized polaritons were directly analyzed by transient absorption(TA)measure-ment.Both of the linear and circular polarization difference in the TA spectra can be retained for a remarkable long time,leading to a polarized PL even at room tempera-ture.More importantly,in the chiral strong coupled WS_(2)-spiral Ag grating devices,the mechanism of the asymmetrical valley-polarized PL(p_(σ+)=14.9%and p_(σ-)=10.8%)is proved by the opposite valley polarization dynamics in the circularly polarized TA spectra.The multiple polarization modulation in monolayer TMDCs-SPPs strong coupling devices could provide a viable route toward multiple polarization polaritonic devices.
出处
《PhotoniX》
SCIE
EI
2022年第1期412-431,共20页
智汇光学（英文）
基金
supported by the National Key Research and Development Program of China and the National Natural Science Foundation of China(NSFC)under Grants 21903035,22073037,21773087,12074141,61960206003
Jilin Provincial Science and Technology Development Project(20210509038RQ).
作者简介
Correspondence:Hai Wang,wanghai03@jlu.edu.cn;Correspondence:Hai-Yu Wang,haiyu_wang@jlu.edu.cn;Correspondence:Qiang Zhou,zhouqiang@jlu.edu.cn。
