Lumerical | Fdtd Tutorial

) and spatial grid size are locked together. To keep the simulation stable, light cannot travel further than one grid cell in a single time step. Lumerical calculates this automatically, but manually shrinking the mesh will inherently increase your simulation time. 2. Setting Up Your First Simulation Workflow

Before drawing shapes, you must define what those shapes are made of. Open the .

A built-in coding environment to automate geometry creation and data analysis using Lumerical’s proprietary scripting language.

Visualizes your structure in 2D and 3D views.

FDTD works by discretizing space (the mesh) and time. It solves the time-dependent Maxwell's equations (Ampere’s and Faraday’s laws) to simulate how electromagnetic fields interact with structures. lumerical fdtd tutorial

Simulation time scales drastically with the volume of the device and the resolution of the grid mesh. 2. Navigating the Lumerical User Interface

Upon opening the software, you are met with several key areas:

The simulation region defines the boundaries of your digital experiment.

A key point to remember is that you can use . This allows you to refine the mesh in specific areas of interest (such as a waveguide core or near a metallic surface) while keeping it coarser in empty space, optimizing computational resources. ) and spatial grid size are locked together

If you are looking to get started, Lumerical provides a robust Ansys Lumerical FDTD simulation tool designed to solve complex photonics problems, including specialized solvers for solar cells and waveguides.

Allows you to execute setup and analysis commands via Lumerical Scripting Language (LSL). 3. Step-by-Step Simulation Workflow

Start with the Ansys blog on FDTD basics to understand the "resonance region" discretization.

Used for automation and advanced analysis. A built-in coding environment to automate geometry creation

: Use these for infinite arrays, metasurfaces, or photonic crystals. Step 3: Setting Up Sources

This guide breaks down the core workflow for setting up a simulation in Lumerical FDTD. 1. Define the Simulation Geometry

FDTD discretizes time and space using a staggered grid known as the Yee cell. Magnetic field (