MoSe₂/WS₂ heterojunction photodiode integrated with a silicon nitride waveguide for near infrared light detection with high responsivity.

ABSTRACT: We demonstrate experimentally the realization and the characterization of a chip-scale integrated photodetector for the near-infrared spectral regime based on the integration of a MoSe₂/WS₂ heterojunction on top of a silicon nitride waveguide. This configuration achieves high responsivity of ~1 A W^-1 at the wavelength of 780 nm (indicating an internal gain mechanism) while suppressing the dark current to the level of ~50 pA, much lower as compared to a reference sample of just MoSe₂ without WS₂. We have measured the power spectral density of the dark current to be as low as ~1 × 10^-12 A Hz^-0.5, from which we extract the noise equivalent power (NEP) to be ~1 × 10^-12 W Hz^-0.5. To demonstrate th

SUBMITTER: Gherabli R 

PROVIDER: S-EPMC9984525 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature