gsim 0.0.5

Electromagnetic simulation for photonics and electronics, powered by GDSFactory+

Overview

gsim connects GDSFactory layout designs to multiple EM solvers for photonic and electronic simulation. It handles geometry extraction, mesh generation, port configuration, and cloud execution so you can go from GDS to S-parameters with minimal boilerplate.

Solvers

Module	Solver	Method	Use Case
gsim.palace	Palace	FEM	RF/microwave, impedance extraction, driven simulations
gsim.meep	Meep	FDTD	Photonic components, S-parameters, mode propagation

Features

• Layer stack extraction — build 3D geometry from PDK layer stacks
• Port configuration — convert GDSFactory ports into solver-compatible definitions
• Mesh generation — GMSH finite-element meshes with configurable quality presets (Palace)
• Cloud execution — upload, run, and download results via gsim.gcloud
• Visualization — solver-agnostic 3D/2D component preview (PyVista, Matplotlib)

Installation

pip install gsim

For development (requires uv):

git clone https://github.com/gdsfactory/gsim
cd gsim
uv sync --dev

Or use the justfile:

just dev

Documentation

See the documentation for API reference and examples.

License

Apache-2.0