Issues

• Meep: subpixel averaging is off by default and changes coupler results a lot

  gdsfactory/gsim#527 · Filter by author Alisama20 opened on Nov 13, 2026

• set_material() is case-sensitive for conductors and fails silently

  gdsfactory/gsim#526 · Filter by author Alisama20 opened on Nov 13, 2026

• TCAD Local Tests: test_edge_couples fails intermittently on windows-latest

  gdsfactory/gsim#523 · Filter by author Alisama20 opened on Nov 13, 2026

• sim.plot_stack() and sim.show_stack() fail on every stack

  gdsfactory/gsim#515 · Filter by author Alisama20 opened on Nov 11, 2026

• BoundaryModeSim: default MGMaxLevels to 1 (Palace multigrid gives wrong 2D boundary-mode losses)

  gdsfactory/gsim#511 · Filter by author Alisama20 opened on Nov 11, 2026

• select_line_mode can pick a spurious metal mode when more modes are requested

  gdsfactory/gsim#498 · Filter by author Alisama20 opened on Nov 9, 2026

• Improve FDTD transfer-mesh robustness for touching same-material Boolean regions

  enhancementp3
  gdsfactory/gsim#491 · Filter by author vvahidd opened on Nov 8, 2026

• FDTD diagnostic windows on a crop edge fall one ulp outside the domain

  gdsfactory/gsim#488 · Filter by author Alisama20 opened on Nov 6, 2026

• Terminal S from lossy multimode wave ports: undo Palace's projection at each frequency

  gdsfactory/gsim#452 · Filter by author Alisama20 opened on Oct 29, 2026
  1

• test palace and fdtd import correctly PDK stack

  gdsfactory/gsim#449 · Filter by author vvahidd opened on Oct 28, 2026
  1

  

• Wave ports: waveport_boundary="pec" can make the port mode a closed-box mode (flat loss, wrong ranking)

  gdsfactory/gsim#408 · Filter by author Alisama20 opened on Oct 20, 2026

• Palace cloud job OOM (exit 137) gives no warning or guidance

  gdsfactory/gsim#398 · Filter by author jackgdsf opened on Oct 19, 2026
  1

• load_stack_yaml drops sidewall_angle

  gdsfactory/gsim#397 · Filter by author jackgdsf opened on Oct 19, 2026
  1

• Air dielectric slab above the stack plus airbox makes Palace abort (non-periodic face with multiple boundary elements)

  gdsfactory/gsim#396 · Filter by author jackgdsf opened on Oct 19, 2026
  2

• Palace domain bottom stays 150 µm below the BOX regardless of substrate thickness in the stack

  gdsfactory/gsim#395 · Filter by author jackgdsf opened on Oct 19, 2026
  2

• Wave ports: spurious port-mode solutions at low frequency (exact sweeps, non-deterministic), and the low-frequency bias of raw short wave-port lines

  gdsfactory/gsim#375 · Filter by author Alisama20 opened on Oct 16, 2026
  4

• Port influence and a stored-fixture de-embedding workflow (PortFixture / deembed_ports)

  gdsfactory/gsim#372 · Filter by author Alisama20 opened on Oct 15, 2026
  1

• Canonical resolved-layer contract: make common/pdk/resolve.py the single stack→3D entry point

  gdsfactory/gsim#334 · Filter by author jackgdsf opened on Oct 7, 2026
  2

• Binary MSH 2.2 meshes for Palace: same results, small gain

  gdsfactory/gsim#330 · Filter by author Alisama20 opened on Oct 7, 2026

• feat(tcad): run the DEVSIM charge-transport solve as a cloud job

  gdsfactory/gsim#323 · Filter by author benvial opened on Oct 6, 2026

• Extend optical material library with cited n/k datasets and shared backend resolution

  enhancement
  gdsfactory/gsim#322 · Filter by author vvahidd opened on Oct 6, 2026

• feat(palace): add target-driven T-coil design and process-corner example

  Feature

  gdsfactory/gsim#275 · Filter by author vvahidd opened on Sep 27, 2026
  1

• feat(palace): add differential interconnect, crosstalk, and TDR example

  gdsfactory/gsim#274 · Filter by author vvahidd opened on Sep 27, 2026

• feat(palace): select separate electrodes and validate capacitor extraction

  gdsfactory/gsim#273 · Filter by author vvahidd opened on Sep 27, 2026
  1

  

• feat(palace): expose adaptive mesh convergence and validated benchmarks

  gdsfactory/gsim#265 · Filter by author vvahidd opened on Sep 18, 2026
  3