Manipulation of unidirectional side scattering of light in transition metal dichalcogenide nanoresonators

High Q Hybrid Mie–Plasmonic Resonances in van der Waals Nanoantennas on Gold Substrate

“…In the past decade, transition-metal dichalcogenide (TMD) monolayers have attracted a large research effort owing to their direct band gap transition and useful optoelectronic properties, rendering the bulk material largely overlooked. More recently, nanoresonators utilizing bulk TMDs to host Mie resonances have gained interest; however, these studies primarily focus on fabricating such structures on low refractive index dielectric substrates such as SiO 2 . − A hybrid TMD-nanoantenna-on-metal system has not been thoroughly explored experimentally, with the previous work being focused on different structures such as TMD gratings on gold, metallic nanoparticle-on-TMD monolayer systems, , or hybrid silicon–metal-based structures. − For example, Yang et al numerically analyzed dielectric nanoantennas situated several nanometers above a silver substrate . Their work showed hybrid dielectric–plasmonic modes , with quality ( Q ) factors up to ∼10 3 and Purcell enhancements of >5000, along with strong electric field confinement in the nanoantenna–substrate gap.…”

“…More recently, nanoresonators utilizing bulk TMDs to host Mie resonances have gained interest; however, these studies primarily focus on fabricating such structures on low refractive index dielectric substrates such as SiO 2 . 2 − 8 A hybrid TMD-nanoantenna-on-metal system has not been thoroughly explored experimentally, with the previous work being focused on different structures such as TMD gratings on gold, 9 metallic nanoparticle-on-TMD monolayer systems, 10 , 11 or hybrid silicon–metal-based structures. 12 − 17 For example, Yang et al numerically analyzed dielectric nanoantennas situated several nanometers above a silver substrate.…”