Terahertz metallic photonic crystals integrated with dielectric waveguides

OPTICS COMMUNICATIONS

卷:475

Article

Liu, Dejun^1,3  Chen, Lin²  Cao, Duo^1,3  Liu, Feng^1,3 

[1] Shanghai Normal Univ, Dept Phys, Shanghai 200234, Peoples R China

[2] Univ Shanghai Sci & Technol, Shanghai Key Lab Modern Opt Syst, Shanghai 200093, Peoples R China

[3] Shanghai Normal Univ, Key Lab Submillimeter Astrophys, Shanghai 200234, Peoples R China

关键词: Terahertz integrated waveguides;    Metallic photonic crystals;    Hybrid waveguides;    Low-loss;    High field confinement;   

DOI  :  10.1016/j.optcom.2020.126197

来源: Elsevier

【 摘 要 】

We numerically investigate a waveguide of metal pillar arrays (MPAs) and a hybrid waveguide consisting of the MPAs and a dielectric film in 0.1-1.0 THz. The numerical results show two resonance modes with a bandgap of 0.14 THz are supported in MPAs. The propagation loss and field confinement can be modified by the addition of a low loss dielectric film by tuning the film thickness and the refractive index. The investigation shows that the lowest loss of the hybrid structures is less than 0.1 cm(-1) at 0.68 THz and the THz waves are tightly confined inside the hybrid waveguide. This work shows the hybrid waveguides are promising towards compact integrated terahertz devices in communication and sensing.

【 授权许可】

Free