Why effective refractive index value high in bend waveguide in comparison to staright waveguide

LoqmLoqm Member Posts: 4

Neff (effective refractive index) calculation for waveguide width optimization, we observed in bent waveguide case the cut-off point (300nm, as shown in bent waveguide plot) and Neff value is higher than straight waveguide however in bent waveguide case losses is relative greater in comparison to straight waveguide case. So ideally Neff value should be less in bend waveguide with respect to staright waveguide, why?


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