Technische Physik and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Physikalisches Institut, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
Ioffe Institute, St. Petersburg, Russia, 194021.
Nat Commun. 2018 Jul 12;9(1):2695. doi: 10.1038/s41467-018-04866-6.
The optical properties of transition metal dichalcogenide monolayers are widely dominated by excitons, Coulomb-bound electron-hole pairs. These quasi-particles exhibit giant oscillator strength and give rise to narrow-band, well-pronounced optical transitions, which can be brought into resonance with electromagnetic fields in microcavities and plasmonic nanostructures. Due to the atomic thinness and robustness of the monolayers, their integration in van der Waals heterostructures provides unique opportunities for engineering strong light-matter coupling. We review first results in this emerging field and outline future opportunities and challenges.
过渡金属二卤族化合物单层的光学性质主要由激子（库仑束缚的电子-空穴对）决定。这些准粒子表现出巨大的振子强度，并产生窄带、明显的光学跃迁，可以与微腔和等离子体纳米结构中的电磁场产生共振。由于单层的原子薄度和稳健性，它们在范德华异质结构中的集成为工程强的光物质耦合提供了独特的机会。我们首先回顾这一新兴领域的初步成果，并概述未来的机遇和挑战。
