Abstract
A graphene-based optical photodetector with a symmetric hybrid plasmonic waveguide that integrates two high-refractive-index dielectric slabs as a finite-width insulator-metal-insulator (IMI) structure is proposed and investigated at . It is shown that by electrically tuning the graphene refractive index, the gap between the silicon slabs and graphene strip as a hybrid plasmonic waveguide results in modified modal behavior over the graphene layer. This highly lossy hybrid surface plasmon polariton strip mode enhances optical absorption in the graphene channel. An analytical approach reveals that this highly confined absorption creates a highly asymmetric hot-carrier spatial temperature profile along the channel. Based on photo-thermoelectric (PTE) effect, this asymmetric temperature profile along with applied source-drain voltage (Vds) creates a PTE current. Coupled to the super plasmonic mode of hybrid plasmonic waveguide (HPW) mechanism, this photodetector exhibits a maximum responsivity of . In addition, for the proposed HPW graphene photodetector (HPW-GPD), the calculated effective mode area, the propagation length and modal propagation loss are , and , respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
