Uniform Narrow Excitonic Spectrum in Large-Area Suspended WSe 2 Monolayers
Giacomo Mariani·Haruki Sanada·Keigo Matsuyama·Yoji Kunihashi·Taro Wakamura·Satoshi Sasaki·Louis Smet·Makoto Kohda·Junsaku Nitta·Riccardo Lodo
Uniformity in the excitonic spectrum is a key requirement for accessing intrinsic excitonic physics in two-dimensional semiconductors; however, in transition-metal dichalcogenide (TMD) monolayers supported on substrates, exciton energies and line widths can vary spatially due to inhomogeneities from contact with other materials or fabrication residues. Suspended TMD monolayers provide a route to minimizing substrate-induced disorder, although conventional transfer processes can introduce contami