Hui Deng1
University of Michigan1
Transitional metal dichalcogenides (TMD) monolayers of composition MX2 (M =Mo,Wand X = S, Se) form a class of semiconductor with unique optical properties and unprecedented flexibility for engineering and integration. They exhibit many novel phenomena and promise new device concepts. However, TMD monolayers of high optical qualities have been limited to micron-sized flakes produced by low-throughput and labor-intensive processes, whereas large-area films are often affected by surface defects and large inhomogeneity. We show a rapid and reliable method to synthesize multi-millimeter-sized TMD monolayers of uniform, high optical quality using 1-dodecanol encapsulation combined with gold-tape-assisted exfoliation [1]. We demonstrate the utility of our encapsulated monolayers by scalable integration with arrays of photonic crystal cavities with varying parameters, all forming polaritons with the same monolayer. We furthermore show the dependence of stimulated relaxation and long-range transport of the polaritons on the photonic crystal parameters.<br/><br/>[1] Q. Li, <i>et. al.</i>, “Macroscopic transition metal dichalcogenides monolayers with uniformly high optical quality.” <i>Nat Commun</i> <b>14</b>, 1837 (2023). doi:10.1038/s41467-023-37500-1