ymahlau/fdtdx

Mechanical Stability / Connectivity of Designs

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#51 opened on Apr 28, 2025

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enhancementhelp wanted

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Description

For 3D inverse design (e.g. for 2PP printing), it is necessary to produce designs which are physically viable and don't have any material floating in the air. Even better, it would be desirable to have designs which are mechanically stable. In mechanical engineering, there are quite a few regularization methods to steer the inverse design process towards these goals:

https://arxiv.org/pdf/2501.09402

Implementing and evaluating these methods for photonic inverse design will require some work. If any of the community members have experiences or know research material about this topic, feel free to post it here.

Contributor guide

Research direction
Examine the paper arXiv:2501.09402 to understand regularization methods. Implement a connectivity constraint using morphological operations or density filters. Test on a simple 2D inverse design problem before moving to 3D.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
PythonJAXFDTDNumerical optimization
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20