Change Log

1.1.6 - 2025-07-08

Added

• Argument use_angle_rotation to Tidy3D conversion functions from Port and FiberPort, to enamble angle_rotation in the ModeSpec they generate, if necessary.

Changed

• Mode fields are only stored in Tidy3d simulation data when needed for mode remapping.

Fixed

• Critical error in annotated types from parametric component library (unhashable types).

1.1.5 - 2025-06-24

Added

• PortSpec.default_radius can be used to set preferred radius for any port specification.

• Interpolation method "poleresidue" to DataModel to use a pole-residue matrix fit for frequency interpolations.

• Argument pre_export_function to write_layout(), Component.write_gds, and Component.write_oas to make temporary changes in components right before exporting.

• Rectangle.perimeter(), Circle.perimeter(), Polygon.perimeter(), and Path.perimeter() for perimeter computation.

• Properties to all objects to hold arbitrary metadata.

• Argument min_evals to Circle and Path section methods to override the minimal number of points used in polygonal conversion based on config.tolerance.

• Argument max_evals to Path section methods to allow the construction of complex geometries that require more evaluations that the default.

• PortSpec.path_profiles_list() to get path profiles always as a list.

Changed

• Deprecation: All json methods have been deprecated for removal in the 1.2 release.

Fixed

• Memory access bug in S matrix comparison.

• Other minor memory leak fixes.

1.1.4 - 2025-05-03

Added

• Component.slice_profile() to create path profiles from existing waveguide geometries.

• ExtrusionSpec.reference to change the reference plane for sidewall angle dilations and erosions.

• MaskSpec.translation to allow masks to be translated during extrusion (mainly for mask alignment sensitivity tests).

• Support for SubpixelSpec to Tidy3DModel and EMEModel.

• Helper function virtual_port_spec() to quickly create virtual port specifications.

Changed

• WaveguideModel now accepts a PortSpec or the string "cross-section" for more flexible propagation index calculation.

• Updated minimal config.grid size to avoid truncation errors when snapping ports.

• Updated default settings for electrical simulations (experimental feature).

• Updated default values for electrical simulation grids and cpw_spec().

Fixed

• parametric.rectangular_spiral() length incorrectly calculated in specific cases.

• Serialization of complex Tidy3D objects included in a Tidy3DModel.

• Improved error handling in a few python interfaces.

• Segfault in Path.bezier().

1.1.3 - 2025-04-11

Added

• Support for angled ports in circuit simulations.

• Several Path attributes.

• Path.interpolate() to query path positions by length.

• Path.updated_copy() to create copies with different widths and offsets.

• ExtrusionTable and PortSpecTable visualizers, used by default with Technology.extrusion_specs and Technology.ports.

• Better console and HTML representations for Technology.

• Support for ports in curved waveguides with Port.bend_radius.

Fixed

• Backwards compatibility fix in phf files using specific parametric technologies.

1.1.2 - 2025-03-25

Fixed

• Crash when no active model is present in phf file.

1.1.1 - 2025-03-24

Added

• Terminal routes in component_from_netlist() accepts keyword arguments.

• Component.query() and Reference.query() to look for ports and terminals within the component dependency tree.

• Arguments boundary_margin and minimal_turn_angle to Component.detect_ports() to fine-tune port detection

• grid_layout() to arrange components or other structures in a rectangular grid.

• pack_layout() to pack components or other structures in a compact area.

• Support for specifying waypoints as 2D coordinates in route_manhattan().

Changed

• Analytical models include all-zero elements in S matrix output.

Fixed

• Tidy3D simulation hanging when an error occurs during upload or download.

• Axis label in plot_s_matrix().

• Component.detect_ports() properly detects and ignores co-linear vertices in polygons.

• Data arrays from numpy and xarray within Tidy3D objects breaking serialization.

1.1.0 - 2025-03-04

Added

• Electrical interface support: electrical port specifications and terminals, terminal routing with parametric.route_taper(), and parametric.route_manhattan() and cpw_spec() utility function to create CPW port specifications.

• Class TimeDomainModel for time-stepping based on a PoleResidueMatrix.

• live_viewer.LiveViewer for live geometry and component visualization.

• Functions PoleResidueMatrix.is_passive(), PoleResidueMatrix.enforce_passivity(), and PoleResidueMatrix.get_rms_error().

• Options passive, delays, stable, and feedthrough in pole_residue_fit() to better control the fitting process.

• parametric.circular_spiral() as an alternative to existing rectangular spiral.

• Argument full_length to parametric.rectangular_spiral() and parametric.circular_spiral() to preset the desired spiral length.

• FDTD cost estimation with Tidy3DModel.estimate_cost().

• Defaults for parametric components and models can be set in config.default_kwargs.

• Path.arc(), Path.turn(), and Path.s_bend() can use defaults for radius and euler_fraction from config.default_kwargs.

• Function s_bend_length() can be used to calculate the ideal S bend length for specific radius and offset.

• Component.size() and Reference.size().

• Terminal.center() and Terminal.size().

• Subscript operation to Component to retrieve ports and terminals.

• Component.disconnected_reference_ports() and Component.add_reference_ports() to facilitate adding ports from references.

• Component.tree_view() to pretty-print component dependency trees.

• Parameter on_boundary to Component.detect_ports() to limit search at the component boundaries.

• Function heal() to remove small features from structures.

• Added bulge option to automatically widen long straight waveguide sections.

• config.svg_reference_labels to control display of labels from references.

• Json representation for planar structures.

• Class FiberPort for general waveguide ports.

• Port.can_connect_to() verifies if 2 ports can be connected by a waveguide route.

• PortSpec.combined_with() to combine path profiles from port specifications.

• PortSpec.added_solver_modes to port specifications, which allows for single TM mode ports.

• Attribute MaskSpec.layer for single-layer mask specifications.

• LayerTable visualizer for technology layer specifications, used by default with Technology.layers.

• Argument verbose to Tidy3DModel.start(), EMEModel.start(), WaveguideModel.start(), and CircuitModel.start().

• Accept simplified forms of port symmetries and added Tidy3DModel.test_port_symmetries().

• abort_pending_tasks() can be used to abort all running simulations at once.

• Function SMatrix.estimate_phase() for estimation of minimum-phase-shift data from given amplitude data, and functions SMatrix.apply_time_delay() and SMatrix.estimate_delays().

• Function port_modes() to solve port modes using caches.

• Argument parallel_jobs to start multiple Monte Carlo tasks in parallel in monte_carlo.s_matrix().

Changed

• Parallel upload and download of Tidy3D tasks.

• Default run_time quality factor changed from 10 to 5 in order to decrease the default estimated cost of Tidy3D runs.

• Use default precision in mode solver.

• Remove out-of bounds structures from simulations to avoid Tidy3D warnings.

• Where available, default keyword arguments for parametric components and technologies are included in Component.parametric_kwargs and Technology.parametric_kwargs.

Fixed

• Bug in MaskSpec comparison.

• Do not create complex geometry with more than 100 sub-geometries to avoid errors in Tidy3D.

• Vernier scale stencil bug fix to generate proper geometry.

• Support for numpy complex scalars in phf streams.

• Better HTML escaping in SVG representations.

• Improved Tidy3D object conversion to include spatial data arrays in runtime caches.

• Port mode numbering for S matrices is consistent with and without setting PortSpec.polarization.

• Bug in error handling within paths.

1.0.5 - 2025-01-02

Added

• Attribute _id for internal use.

• Configuration option config.svg_label_scaling.

Changed

• More robust guarantees for gradients for path endpoints.

• Paths are stored as polygons by default in GDSII and OASIS files.

• Reference.component can be set.

• Simplified updates argument in CircuitModel.start().

Fixed

• Path alignment fixes for parametric couplers.

• Minor docstring fixes.

1.0.4 - 2020-11-21

Added

• Complex vector fitting for baseband signals via pole_residue_fit() with real=False.

Changed

• Sign convention for the frequency variable in PoleResidueMatrix.

• In pole_residue_fit(), min_poles and max_poles now count a single conjugate pair as two poles.

• S matrices store all-zeros instead of dropping them.

• Routes can be specified by reference and port name to facilitate updating if the reference is transformed.

Fixed

• Significant accuracy improvements in pole_residue_fit().

• Component comparison takes ports into account.

1.0.3 - 2024-11-01

Fixed

• Function stencil.as_component() takes a technology argument for the created component.

• Apply union to polygons before erosion, as indicated in the documentation.

1.0.2 - 2024-10-25

Added

• Function Tidy3DModel.test_port_symmetries() gained a verbose argument to control printed messages.

Changed

• Function tidy3d_plot() will use the component’s Tidy3DModel if it has one.

Fixed

• Function Port.to_tidy3d_mode_solver() correctly sets the generated group_index_step.

• Tidy3DModel supports 2D simulations when bounds are overridden.

1.0.1 - 2024-10-15

Changed

• Suppress extrusion error message from Tidy3D when falling back to triangular mesh.

Fixed

• Always export paths with round or beveled joins as polygons.

• Forbid inheritance from PhotonForge classes (except Model) because the internal design does not support it.

• Error when parsing arguments in Path.parametric().

• Runtime errors in EMEModel.

• Degenerate port modes are handled correctly when symmetry is used in Tidy3DModel and EMEModel.

1.0.0 - 2024-10-10

Initial release.