Jin Yuxuan, Wu Kai, Sheng Bining, Ma Wentao, Chen Zefeng, Li Xiaofeng
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China.
Nanomaterials (Basel). 2023 Jun 30;13(13):1987. doi: 10.3390/nano13131987.
Plasmon resonances can greatly enhance light-matter interactions of two-dimensional van der Waals materials. However, the quality factor of plasmonic resonances is limited. Here, we demonstrate a plasmonic quasi-bound state in the continuum (quasi-BIC), which is composed of gold nanorod pairs. Through controlling the rotation angle of the nanorods, the quality factor of the plasmonic BIC mode can be tuned. Simulation results show that the plasmonic BIC combines the advantages of high-quality factor from the BIC effect and small mode volume from plasmonic resonance. Experiment results show that the designed plasmonic BIC mode exhibits a quality factor higher than 15 at the wavelength of around 1250 nm. Through integrating the plasmonic bound state structure with monolayer molybdenum ditelluride (MoTe), the exciton emission of MoTe in the PL spectrum split into two exciton-polariton modes, which is attributed to the high Q factor and strong interaction between the BIC mode and excitons of MoTe.
表面等离激元共振可以极大地增强二维范德华材料的光与物质相互作用。然而，表面等离激元共振的品质因数是有限的。在此，我们展示了一种由金纳米棒对组成的连续域中的表面等离激元准束缚态（准BIC）。通过控制纳米棒的旋转角度，可以调节表面等离激元BIC模式的品质因数。模拟结果表明，表面等离激元BIC结合了BIC效应带来的高品质因数和表面等离激元共振带来的小模式体积的优点。实验结果表明，所设计的表面等离激元BIC模式在波长约为1250 nm处表现出高于15的品质因数。通过将表面等离激元束缚态结构与单层碲化钼（MoTe）集成，PL光谱中MoTe的激子发射分裂为两个激子 - 极化激元模式，这归因于高Q因子以及BIC模式与MoTe激子之间的强相互作用。
Zotero 插件
