A terahertz (THz) hollow-core Bragg waveguide constructed by cascading waveguide units with supporting bridges (SPBs) on different air rings is proposed. The influence of the SPBs on the transmission loss of the waveguide is demonstrated numerically. Results show that the SPBs in the first air ring play the most important role in the transmission loss. By reasonably selecting the length ratio of the waveguide units, the waveguide absorption loss can be reduced to less than 0.4 dB / m in a wide bandwidth range of 0.53 to 0.73 THz, which is at least 2 orders lower than the material absorption loss. |
ACCESS THE FULL ARTICLE
No SPIE Account? Create one
CITATIONS
Cited by 3 scholarly publications.
Waveguides
Terahertz radiation
Absorption
Bridges
3D printing
Cladding
Optical engineering