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arXiv 1610.04548cond-mat.mes-hall
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二维层状材料中的极化激元

Polaritons in layered 2D materials

Tony Low, Andrey Chaves, Joshua D. Caldwell, Anshuman Kumar, Nicholas X. Fang, Phaedon Avouris, Tony F. Heinz, Francisco Guinea, Luis Martin-Moreno, Frank Koppens

摘要:

近年来,通过大量的偶极型极化激元激发增强的光-物质相互作用已经在二维(2D)层状材料中观察到。在石墨烯中,预测和观察到电可调谐和高度受限的等离子体激元,为光电子学,生物传感和其他中红外应用开辟了机会。在六方氮化硼(hBN)中,低损耗红外激活声子极化激元在某些频率下表现出双曲线行为,从而允许呈现高品质因数和超透镜效应的类射线传播。在过渡金属二硫属化物(TMD)中,在2D极限中减少屏蔽导致具有大结合能的光学突出激子,这些极化激子模式最近已经用扫描近场光学显微镜(SNOM)观察到。在这里,我们回顾了最新的最先进的实验进展,调查了二维材料中的极化激元模式,它们的光谱特性,品质因数和应用空间的庞大库。总之,新兴的2D材料极化激元学及其混合体领域为操纵可见光、红外到太赫兹光谱范围内的光-物质相互作用提供了诱人的途径,其新的光学控制超出了使用传统块状材料所能实现的范围。

英文摘要:

In recent years, enhanced light-matter interactions through a plethora of dipole-type polaritonic excitations have been observed in two-dimensional (2D) layered materials. In graphene, electrically tunable and highly confined plasmon-polaritons were predicted and observed, opening up opportunities for optoelectronics, bio-sensing and other mid-infrared applications. In hexagonal boron nitride (hBN), low-loss infrared-active phonon-polaritons exhibit hyperbolic behavior for some frequencies, allowing for ray-like propagation exhibiting high quality factors and hyperlensing effects. In transition metal dichalcogenides (TMDs), reduced screening in the 2D limit leads to optically prominent excitons with large binding energy, with these polaritonic modes having been recently observed with scanning near field optical microscopy (SNOM). Here, we review recent progress in state-of-the-art experiments, survey the vast library of polaritonic modes in 2D materials, their optical spectral properties, figures-of-merit and application space. Taken together, the emerging field of 2D material polaritonics and their hybrids provide enticing avenues for manipulating light-matter interactions across the visible, infrared to terahertz spectral ranges, with new optical control beyond what can be achieved using traditional bulk materials.

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。

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