Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
Phys Rev Lett. 2015 Dec 11;115(24):246401. doi: 10.1103/PhysRevLett.115.246401. Epub 2015 Dec 8.
We report an extended family of spin textures of zero-dimensional exciton-polaritons spatially confined in tunable open microcavity structures. The transverse-electric-transverse-magnetic (TE-TM) splitting, which is enhanced in the open cavity structures, leads to polariton eigenstates carrying quantized spin vortices. Depending on the strength and anisotropy of the cavity confining potential and of the TE-TM induced splitting, which can be tuned via the excitonic or photonic fractions, the exciton-polariton emissions exhibit either spin-vortex-like patterns or linear polarization, in good agreement with theoretical modeling.
我们报告了一个零维激子极化激元的自旋纹理家族，其在可调谐的开放式微腔结构中具有空间限制。在开放式腔结构中增强的横电-横磁（TE-TM）分裂导致极化激元本征态携带量子化的自旋涡旋。取决于腔限制势的强度和各向异性以及 TE-TM 诱导的分裂，通过激子或光子分数可以进行调节，激子极化激元发射表现出自旋涡旋样图案或线性偏振，与理论模型吻合良好。
