Terahertz Hot Electron Bolometer Coherent and Direct Detectors Utilizing Si Waveguiding Structures

IEEE 8th All-Russian Microwave Conference (RMC). 2022. Vol. 2022. P. 19–22.

Shurakov A., Prikhodko A., Belikov I., Goltsman G.

Terahertz coherent and direct detectors are in demand by numerous scientific and practical applications. Both cryogenic and room temperature detectors find use in astronomical, medical and security systems. Driven by the enlarged society needs for data transfer rates, they are also becoming of interest in terahertz communication area. Integrated Si photonic crystals are recently proposed as beneficial platform for terahertz integrated circuits. Some designs of Si power distribution networks including basic passive components already appear. However, development of nonlinear frequency conversion devices naturally compliant with the platform is at an early stage. In addition to integrability, the platform enables significant reduction of propagation losses as compared to widely used metallic waveguides at terahertz frequencies. In this paper, we overview conventional designs of input optics and power distribution networks of terahertz detectors. We also report on our recent developments in design and fabrication of terahertz HEB-based coherent and direct detectors making use of Si waveguiding structures.

Keywords: photonic crystal waveguide