Calculate the photonic band diagram (Frequency vs. Wavevector) for a triangular lattice of air holes in a silicon slab.
Sweep the radius using a parameter sweep ( Optimizations and Sweeps > Parameter Sweep ) to see how the resonance red-shifts as the sphere gets larger.
You cannot just butt-couple a fiber to a chip. A grating coupler allows for wafer-scale testing. This example teaches you how to use for optimization. lumerical fdtd examples
When reviewing or building your own , keep these optimization rules in mind:
Understand basic setup, sources, monitors, and transmission/reflection calculations. Calculate the photonic band diagram (Frequency vs
A full 3D metalens is massive. Use symmetry () if the lens is circular. Usually, you simulate a small subsection (e.g., a 5 µm by 5 µm slice) to verify focusing performance.
Remember: Your simulation is only as good as your mesh convergence and boundary setup. Keep experimenting, keep iterating, and always validate your FDTD results against analytical models when possible. Happy simulating! You cannot just butt-couple a fiber to a chip
When running these examples, you will encounter errors. Here is the fix: