Abstract
Terahertz (THz) photonic waveguides are of great importance in THz integrated technology, especially for versatile signal processing. However, in THz photonics, very few fundamental “building blocks” equivalent to those used in muti-functional electronics circuits exist. This study proposes a photonics-inspired micro-ring whispering gallery mode resonator (WGMR) waveguide with a standard waveguide-compatible package on silicon platform. A gradual taper is integrated on the same chip to improve the coupling efficiency and reduce transmission loss. The packaged WGMR waveguide with an operating range of 0.360 to 0.440 THz had a maximum measured extinction ratio of 32 dB at 0.390 THz, with a Q factor of 385 and an insertion loss of 2.6 dB. The compact and standard waveguide-compatible packaged WGMR can easily be integrated into practical terahertz application systems for THz signal processing and as a tool for the study of fundamental THz science.
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