Why are the physical structures (waveguides) in photonic chips often larger than those in traditional microelectronics?

Answer

Light operates at much longer wavelengths than manipulated electrons

Fabrication is difficult because light operates at significantly longer wavelengths than electrons, requiring the physical guiding structures to be substantially larger.

Why are the physical structures (waveguides) in photonic chips often larger than those in traditional microelectronics?
lightRolecomputingcomponentphotonic