Table 1.

Performance comparison between an extreme skin-depth (e-skid waveguide) and other dielectric waveguides

Reference	Cross-talk	Propagation loss
Superlattice44	−20 dB	>20 dB/cm
Adiabatic elimination45	−21.9 dB	N/A
Inverse design48	−22.9 dB	>300 dB/cm
Dissimilar waveguides78	−20 dB	N/A
Sinusoidal waveguides79	−26.8 dB	>600 dB/cm
This work (e-skid)	−30 dB	3.67 dB/cm

It is seen that the cross-talk is significantly reduced in e-skid waveguides at the negligible cost of propagation loss in comparison with other approaches