Zhang Qi, Tan Chaohua, Huang Guoxiang
State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China.
NYU-ECNU Joint Physics Research Institute at NYU-Shanghai, Shanghai 200062, China.
Sci Rep. 2016 Feb 19;6:21143. doi: 10.1038/srep21143.
We propose a scheme to realize a lossless propagation of linear and nonlinear Airy surface polaritons (SPs) via active Raman gain (ARG). The system we suggest is a planar interface superposed by a negative index metamaterial (NIMM) and a dielectric, where three-level quantum emitters are doped. By using the ARG from the quantum emitters and the destructive interference effect between the electric and magnetic responses from the NIMM, we show that not only the Ohmic loss of the NIMM but also the light absorption of the quantum emitters can be completely eliminated. As a result, non-diffractive Airy SPs may propagate for very long distance without attenuation. We also show that the Kerr nonlinearity of the system can be largely enhanced due to the introduction of the quantum emitters and hence lossless Airy surface polaritonic solitons with very low power can be generated in the system.
我们提出了一种通过有源拉曼增益（ARG）实现线性和非线性艾里表面极化激元（SPs）无损传播的方案。我们所建议的系统是由负折射率超材料（NIMM）和电介质叠加而成的平面界面，其中掺杂了三能级量子发射器。通过利用量子发射器的有源拉曼增益以及负折射率超材料的电响应和磁响应之间的相消干涉效应，我们表明不仅可以完全消除负折射率超材料的欧姆损耗，还可以完全消除量子发射器的光吸收。结果，非衍射艾里表面极化激元可以无衰减地传播很长距离。我们还表明，由于量子发射器的引入，系统的克尔非线性可以大大增强，因此可以在系统中产生具有非常低功率的无损艾里表面极化激元孤子。
