Wang Yuefeng, Huang Di, Xia Meng, Zhou Jiaxin, Chen Yuhua, Zhang Xingwang
School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People's Republic of China.
Nano Lett. 2024 Sep 18;24(37):11551-11558. doi: 10.1021/acs.nanolett.4c03040. Epub 2024 Sep 3.
Atomically thin transition metal dichalcogenides (TMDs) with ambient stable exciton resonances have emerged as an ideal material platform for exciton-polaritons. In particular, the strong coupling between excitons in TMDs and optical resonances in anisotropic photonic nanostructures can form exciton-polaritons with polarization selectivity, which offers a new degree of freedom for the manipulation of the light-matter interaction. In this work, we present the experimental demonstration of polarization-controlled exciton-polaritons in tungsten disulfide (WS) strongly coupled with polarization singularities in the momentum space of low-symmetry photonic crystal (PhC) nanostructures. The utilization of polarization singularities can not only effectively modulate the polarization states of exciton-polaritons in the momentum space but also facilitate or suppress their far field coupling capabilities by tuning the in-plane momentum. Our results provide new strategies for creating polarization-selective exciton-polaritons.
具有环境稳定激子共振的原子级薄过渡金属二卤化物（TMDs）已成为激子极化激元的理想材料平台。特别是，TMDs中的激子与各向异性光子纳米结构中的光学共振之间的强耦合可以形成具有偏振选择性的激子极化激元，这为操纵光与物质相互作用提供了新的自由度。在这项工作中，我们展示了在二硫化钨（WS）中与低对称光子晶体（PhC）纳米结构动量空间中的偏振奇点强耦合的偏振控制激子极化激元的实验演示。偏振奇点的利用不仅可以有效地调制动量空间中激子极化激元的偏振态，还可以通过调整面内动量来促进或抑制它们的远场耦合能力。我们的结果为创建偏振选择性激子极化激元提供了新策略。
