Propagating Polaritons in III-Nitride Slab Waveguides

作     者：J. Ciers J. G. Roch J.-F. Carlin G. Jacopin R. Butté N. Grandjean 

作者机构：Institute of Physics École Polytechnique Fédérale de Lausanne (EPFL) CH-1015 Lausanne Switzerland 

出 版 物：《Physical Review Applied》 (Phys. Rev. Appl.)

年 卷 期：2017年第7卷第3期

页      面：034019-034019页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Swiss National Science Foundation [200020_162657] Swiss National Science Foundation (SNF) [200020_162657] Funding Source: Swiss National Science Foundation (SNF) 

主　　题：Exciton polariton Photonics Polaritons Waveguides III-V semiconductors Quantum wells Finite-difference time-domain method Time-resolved photoluminescence 

摘      要：We report on III-nitride waveguides with c-plane GaN/(Al,Ga)N quantum wells in the strong light-matter coupling regime supporting propagating polaritons. They feature a normal-mode splitting as large as 60 meV at low temperatures thanks to the large overlap between the optical mode and the active region, a polariton decay length up to 100 μm for photonlike polaritons and a lifetime of 1 to 2 ps, with the latter values being essentially limited by residual absorption occurring in the waveguide. The fully lattice-matched nature of the structure allows for very low disorder and high in-plane homogeneity, which is an important asset for the realization of polaritonic integrated circuits that could support nonlinear polariton wave packets up to room temperature thanks to the large exciton binding energy of 40 meV.