, processes, and materials by solving Maxwell's equations in the time domain. This tutorial provides a structured approach to setting up, running, and analyzing simulations within the Lumerical environment. 1. Introduction to the FDTD Method
: A 2021 primer from Cody McCoy focusing on the underlying Yee's method and how FDTD handles broadband simulations and light interaction. Core Simulation Workflow
Balancing simulation speed with spatial resolution (mesh override).
Photonic materials change behavior based on wavelength. You must ensure your material models are accurate before running calculations. Click on the button. Look at Si (Silicon) - Palik and SiO2 (Glass) - Palik . lumerical fdtd tutorial pdf
Create a substrate using a object. Set the material to SiO2 (Glass) - Palik .
Injecting light into the system and placing detectors to capture data.
This guide serves as a foundational "tutorial pdf" style resource to help you navigate the complexity of electromagnetic simulations. 1. Introduction to the FDTD Method , processes, and materials by solving Maxwell's equations
Best for open-boundary problems (light escaping into free space). Always leave at least half a wavelength of distance between your physical structure and the PML boundary to prevent artificial field clipping.
Change X and Y boundary conditions to (for normal incidence) or Bloch (for oblique incidence). Set the Z boundaries to PML .
Used for repeating structures like photonic crystals or gratings under normal (Periodic) or angled (Bloch) incidence. Introduction to the FDTD Method : A 2021
Tracks how fast fields decay. Useful for checking if a simulation ran long enough. Step 4: Run, Check Convergence, and Analyze Click Run to execute the simulation.
Real-world materials change their refractive index based on wavelength.