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Grating-assisted_mode_conversion

Structure and parameter:

image-20240108174153008

w = 1 μm d = 50 nm

Period initial

Mode effective index:

image-20240108174235914

Period initial : 1550/(2.751637-2.426784) = 4771.388905 nm

Simulation:

image-20240108174318261

Optimized period: 5.08 μm

Result:

120240108