Enhanced radiative emission from monolayer MoS2 films using a single plasmonic dimer nanoantenna

• DOI: 10.1063/1.4993427
• Publication Date: 2017-07-17T13:59:33Z
• Authors: Edgar Palacios; Spencer Park; Serkan Butun; Lincoln Lauhon; Koray Aydin
• Keywords: Light emission; Purcell effect

By thinning transition metal dichalcogenides (TMDCs) to monolayer form, a direct bandgap semiconductor emerges which opens up opportunities for use in optoelectronic devices. However, absorption and radiative emission is drastically reduced hinders their applicability practical One way address this challenge design plasmonic resonators that localize electric fields within or near the two-dimensional (2D) material confine excitation increase Purcell factors. Previous studies have successfully utilized method enhancing 2D-TMDCs by using large area arrays exhibit complex interactions due far-field couplings take place over many periods. In study, we demonstrate photoluminescence enhancements MoS2 under single Au nanoantennas only near-field interactions. Here, originate from of plasmons confined 20 nm yields peak enhancement 8-fold an corrected >980 fold. Additionally, simulated trends are found agree well with experimental results understand optimal requirements. Our will provide better understanding local 2D materials small areas essential future applications truly compact devices based on dimensionality materials.