This repository This repository contains data, code, and other materials for the following three papers: Planar Josephson Junctions Templated by Nanowire Shadowing ("technique paper", arXiv:2211.04130), Large second-order Josephson effect in planar superconductor-semiconductor junctions ("2nd harmonic", arXiv:2211.07119, SciPost Phys. 16, 030 (2024)), Missing odd-order Shapiro steps do not uniquely indicate fractional Josephson effect ("missing steps", arXiv:2211.08710). ZIP files [Full raw data and summaries] ***.zip: Full original raw data, measurement and instrument logs, and summary slides (plotted extended data beyond paper figures) zipped for different cooldowns. [Paper figures] ***.zip: Paper figures, processed figure data, and data-processing code for paper figures. Other ZIP files with self-explaining names. Data formats MTX: A simple 2D/3D matrix format developed for Spyview. DAT: Plain-text tabular data. DAT and MTX files can be plotted with Spyview, qtplot (a portable version for Windows can be downloaded here), Jupyter notebooks in ZIP files or here. SET: Instrument settings. PY: Measurement scripts. IPYNB: Jupyter notebooks with code and figures. They can be previewed on this page.