Multiplexing Schemes for sub-THz/THz Interconnects (Invited)

This paper discusses the multiplexing schemes for sub-THz/THz Interconnect, which has the potential to complement the existing electrical and optical interconnects. Using a wideband and low-loss Si dielectric waveguide (DWG) as the medium, the proposed sub-THz/THz interconnect achieves tens of Gbps date rates with high energy-efficiency with the potential to reach a longer distance than electrical interconnects. The bandwidth density can be further boosted by employing advanced multiplexing schemes. Frequency division, mode division and polarization multiplexing are discussed and demonstrated. The simulated and measured results show that the multiplexing schemes expand the transmission bandwidth by introducing multiple sub-channels with crosstalk < -20 dB.