According to the above analysis, it can be obtained that the group index of the TE mode of the slot waveguide structure will be much lower than that of the strip waveguide at the wavelength of 1550nm.
Based on the above analysis, it can be concluded that the group index of TE mode in slot waveguide structure will be much lower than that of strip waveguide at 1550nm wavelength.
According to the above analysis, it can be concluded that the group index of TE mode of groove waveguide will be much lower than that of strip waveguide at 1550nm wavelength.