π-phase modulated monolayer supercritical lens.

ABSTRACT: The emerging monolayer transition metal dichalcogenides have provided an unprecedented material platform for miniaturized opto-electronic devices with integrated functionalities. Although excitonic light-matter interactions associated with their direct bandgaps have received tremendous research efforts, wavefront engineering is less appreciated due to the suppressed phase accumulation effects resulting from the vanishingly small thicknesses. By introducing loss-assisted singular phase behaviour near the critical coupling point, we demonstrate that integration of monolayer MoS₂ on a planar ZnO/Si substrate, approaching the physical thickness limit of the material, enables a π phase jump. Moreover, highly dispersive extinctions of MoS₂ further empowers broadband phase r

SUBMITTER: Qin F 

PROVIDER: S-EPMC7782844 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature