Modelling and Study of a THz Hollow Photonic Crystal Integrated Waveguide

We present a novel design of low-loss single-mode flat hollow photonic crystal integrated waveguide (HPCIW). The simulated propagation loss is below 1 dB/cm over the operating frequency range between 0.92 THz and 1.06 THz, with a representative loss of 0.8 dB/cm at 1 THz. Compared with substrate integrated waveguide (SIW) and photonic crystal waveguide, the proposed HPCIW requires no via and can be integrated vertically, which make the HPCIW a promising candidate for multilayer THz system in package (TSiP) applications.