Numerical Investigation of Split Ring Resonator-Based Terahertz Filter

The terahertz (THz) filters are one of the components that plays a crucial role in photonics to select the appropriate signals needed for various applications. Since the discovery of metamaterials (MMs) and the advancement in the field of nano-fabrication, many MM-based THz filters have been developed using different MM structures/shapes. In this work, a split ring resonator (SRR)-based MM filter is designed and investigated with different top layers and substrates. The designed filter shows different filter responses like low pass (0.1–6.3 THz) and high pass (4.6–10 THz) in the THz regime.