arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1705.09752cond-mat.quant-gasquant-ph
收藏

激子-极化激元量子流体中特殊点的手征模

Chiral modes at exceptional points in exciton-polariton quantum fluids

T. Gao, G. Li, E. Estrecho, T. C. H. Liew, D. Comber-Todd, A. Nalitov, M. Steger, K. West, L. Pfeiffer, D. Snoke, A. V. Kavokin, A. G. Truscott, E. A. Ostrovskaya

摘要:

我们演示了激子-极化激元量子流体中手征模--旋向固定的涡旋流的产生。手征模出现在激子极化激元的光诱导谐振腔中的例外点(非厄米谱简并)附近。特别地,通过驱动非厄米环形谐振器的两个偶极模式进入简并来产生涡旋。通过系统参数空间中的例外点的过渡是通过精确操纵形成谐振器的闭壁势的实部和虚部来实现的。当系统被驱动到例外点附近时,我们观察到具有固定轨道角动量(拓扑荷)的涡旋态的形成。我们的方法可以扩展到通过合并多个非厄米谱简并来产生高阶轨道角动量态,这可以在集成光电子学中找到应用。

英文摘要:

We demonstrate generation of chiral modes -- vortex flows with fixed handedness in exciton-polariton quantum fluids. The chiral modes arise in the vicinity of exceptional points (non-Hermitian spectral degeneracies) in an optically-induced resonator for exciton polaritons. In particular, a vortex is generated by driving two dipole modes of the non-Hermitian ring resonator into degeneracy. Transition through the exceptional point in the space of the system's parameters is enabled by precise manipulation of real and imaginary parts of the closed-wall potential forming the resonator. As the system is driven to the vicinity of the exceptional point, we observe the formation of a vortex state with a fixed orbital angular momentum (topological charge). Our method can be extended to generate high-order orbital angular momentum states through coalescence of multiple non-Hermitian spectral degeneracies, which could find application in integrated optoelectronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑