Low-Cost Plasmonic Platform for Photon-Emission Engineering of Two-Dimensional Semiconductors

Although the field of two-dimensional (2D) materials has democratized science by making high-quality samples accessible cheaply, due to atomically thin nature these systems, an integration with nanostructures is almost always required obtain a significant optical response. Traditionally, are fabricated via electron beam lithography or focused ion milling, which expensive, and large-area fabrication can be further time-consuming. In order overcome this problem, we report 2D semiconductors on cost-effective nanocone platform. We show that plasmon modes our structures lead photoluminescence enhancement monolayer ${\text{WSe}}_{2}$ about eight ten times compared nonplasmonic case, consistent finite-difference time-domain simulations. Excitation power-dependent measurements reveal platform enables versatile route engineering relative exciton trion contributions emission.