Design and Analysis of Ultralow Voltage Graphene on the Silicon Rich Nitride Tunable Ring Resonator-Based Add-Drop Filter for DWDM Systems

<div>The permittivity (real and imaginary parts) characteristics of graphene versus the chemical potential show three regions: a high absorption region where graphene behaves as a lossy dielectric medium (<i>μ</i><sub><i>c</i></sub> &lt; 0.2 eV) a transition region (0.2 eV &lt; <i>μ</i><sub><i>c</i></sub> &lt; 0.6 eV) with median absorption suitable for the tuning process and a region of low absorption with a linear dependence where graphene behaves as a quasimetallic medium (<i>μ</i><sub><i>c</i></sub> &gt; 0.6 eV).</div>

International Journal of Optics

fig4

Figure 4

Figure 4: Design and Analysis of Ultralow Voltage Graphene on the Silicon Rich Nitride Tunable Ring Resonator-Based Add-Drop Filter for DWDM Systems 