The FDTD reference manual provides detailed descriptions of product features.
- FDTD course: A self paced course intended for beginner to intermediate users with a focus on providing an understanding of the solver physics, simulation workflow and data analysis. The "My first simulation" section is a great getting started tutorial.
- FDTD videos: List of videos from the FDTD course.
- Ansys Learning Forum (Photonics category): A large repository of Q&A content from the Ansys Lumerical community.
- Application Gallery: Find example files, simulation methodologies, and tips to help you get started quickly and easily. You can also browse the Application Gallery directly from within our products in the product launcher.
Learn about the FDTD solver and related topics
- Finite Difference Time Domain (FDTD) solver introduction
- Understanding ray vs wave optics with a simple example
- Units and normalization
- Frequency domain normalization
- Spectral averaging
- Parseval's theorem - Energy conservation
- Far-field projections
- Grating projections
Learn how to define the material properties that will be used in your simulations.
- Material Database
- Material Explorer
- Material Permittivity Models
- Anisotropic Materials
- Advanced Material Models
- Flexible Material Plugin Framework
- Mesh Order
These objects are used to model the physical structure, define the solver region, any sources of light or doping/generation regions as well as monitors to collect data. The pages provide detailed descriptions of each simulation object. Simulation objects can be added by clicking on the corresponding icon in the GUI.
- Primitives: Triangle, Rectangle, Polygon, Circle, Ring, Custom, Surface, Waveguide, Sphere, Pyramid, Planar solid, 2D rectangle, 2D polygon
- Complex structures: Arrays of objects, Rounded corners, Waveguide bends, Sidewall angle, Spiral and helix, Surface roughness, 3D contour
- Layer builder
- Dataset builder
- Extending structures through PML
Simulation objects are used to define simulation parameters like boundary conditions and mesh size. More information about the solver algorithms can be found in the Solvers section.
- FDTD solver
- Mesh override
- Getting the mesh size
- Mesh refinement
- Mesh refinement options
- Using the non-uniform mesh
- Boundary conditions
The import button includes options to import from a variety of formats:
- Plane-wave and Beam
- Integrated mode source
- Temporal incoherence
- Changing the source bandwidth
- Refractive index
- Field time
- Frequency-domain (profile /power)
- Mode expansion
- Spectral averaging
Optimizations and sweeps
Learn how to run parameter sweep, optimization, yield analysis, and s-parameter analysis tasks.
- Parameter sweeps
- Monte Carlo analysis
- S-parameter matrix sweep
Learn how to access and analyze simulation data.
Working with the graphical user interface (GUI):
- Charge and current measurements
- Curved or angled monitors
- Structure outlines
- Changing the far-field refractive index
- Projections from a monitor box
- Polarization ellipse
- Absorption per unit volume
- Direction of power flow
- Power transmission box
- Effective mode area
- Modal volume