Theory of Edge Effects and Conductance for Applications in Graphene-Based Nanoantennas

Tomer Berghaus, Touvia Miloh, Oded Gottlieb, Gregory Ya Slepyan

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים


In this paper, we present a theory of edge effects in graphene for its applications to nanoantennas in the THz, infrared, and visible frequency ranges. The novelty of the presented model is reflected in its self-consistency, which is reached due to the formulation in terms of dynamical conductance instead of ordinary surface conductivity. The physical model of edge effects is based on using the concept of the Dirac fermion and the Kubo approach. In contrast with earlier well-known and widely used models, the surface conductance becomes non-homogeneous and non-local. The numerical simulations of the spatial behavior of the surface conductance were performed in a wide range of values, known from the literature, for the graphene ribbon widths and electrochemical potential. It is shown that if the length exceeds 800 nm, our model agrees with the classical Drude conductivity model with a relatively high degree of accuracy. For rather short lengths, the conductance exhibits a new type of spatial oscillations, which are not present in the ordinary conductivity model. These oscillations modify the form of effective boundary conditions and integral equations for electromagnetic field at the surface of graphene-based antenna. The developed theory opens a new way for realizing electrically controlled nanoantennas by changing the electrochemical potential via gate voltage. The obtained results may be applicable for the design of different carbon-based nanodevices in modern quantum technologies.

שפה מקוריתאנגלית
מספר המאמר2221
כתב עתApplied Sciences (Switzerland)
מספר גיליון4
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - פבר׳ 2023

ASJC Scopus subject areas

  • ???subjectarea.asjc.2500???
  • ???subjectarea.asjc.3100.3105???
  • ???subjectarea.asjc.2200???
  • ???subjectarea.asjc.1500.1508???
  • ???subjectarea.asjc.1700.1706???
  • ???subjectarea.asjc.1500.1507???

טביעת אצבע

להלן מוצגים תחומי המחקר של הפרסום 'Theory of Edge Effects and Conductance for Applications in Graphene-Based Nanoantennas'. יחד הם יוצרים טביעת אצבע ייחודית.

פורמט ציטוט ביבליוגרפי