CPC G02F 1/2257 (2013.01) [G02F 1/01708 (2013.01); G02F 1/025 (2013.01); G02F 1/212 (2021.01); G02F 2203/50 (2013.01)] | 20 Claims |
1. A phase shifter, comprising:
a light input end;
a light output end;
a first semiconductor material;
a second semiconductor material different from the first semiconductor material, the second semiconductor material contacting the first semiconductor material along a boundary area, wherein the boundary area forms at least one discrete multi-pointed enclosed shape when viewed from a longitudinal cross sectional view extending from the light input end to the light output end, and wherein the boundary area extends from one end of a core width of the phase shifter to a second end of the core width of the phase shifter; and
a core and a cladding, wherein the core is part of a folded waveguide phase shifter in which light may propagate through from the light input end to the light output end.
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