单层二硫化钼和铝盘之间弱的等离子激元-激子耦合。

Weak plasmon-exciton coupling between monolayer molybdenum disulfide and aluminum disks.

出版信息

Opt Lett. 2018 Jul 15;43(14):3204-3207. doi: 10.1364/OL.43.003204.

DOI:10.1364/OL.43.003204

Abstract

Manipulation of the photoluminescence (PL) of monolayer (ML) molybdenum disulfide (MoS) with metallic plasmonic nanostructures has attracted much more attention for potential applications in optoelectronic devices. However, due to the limitation of resonance wavelength and oxidation properties, gold and silver are not the best selections for manipulating PL of MoS. Here, we employ aluminum (Al) disks to tune the PL of ML MoS. We have found that PL enhancement reaches the maximum when plasmonic resonances of Al disks overlap with the absorption peaks of ML MoS. Near-field simulations show that PL enhancement is due to weak plasmon-exciton coupling.

摘要

利用金属等离子体纳米结构来调控单层（ML）二硫化钼（MoS）的光致发光（PL），已经引起了人们对其在光电器件中潜在应用的极大关注。然而，由于共振波长和氧化性质的限制，金和银并不是调控 MoS 的 PL 的最佳选择。在这里，我们采用铝（Al）盘来调谐 ML MoS 的 PL。我们发现，当 Al 盘的等离子体共振与 ML MoS 的吸收峰重叠时，PL 增强达到最大值。近场模拟表明，PL 增强是由于弱等离子体-激子耦合。