Checking live state · adaptive carrier-transported waveform · single-GPU serial

8.4 µm silicon nanobeam · adaptive waveform frontier

Frozen plateau, current frontier, and best feasible waveform topology

Latest same-lineage checkpoint-labeled forward Ey field audit

Adaptive waveform target, Q, loading, wavelength, and mode-identity progress

The live frontier starts from the immutable Q≈30k topology-free plateau and uses no held-out reference geometry. Its carrier-transported temporal target stays at twice the measured Q and re-anchors automatically; loading, mode identity, and broad wavelength membership are buffered constraints. Exact replay accepts every material change. The predecessor and all failed oversized escapes remain frozen evidence.

Live · true 2D x-z test · symmetric TE input

20 µm SiN/SiO2 atom gap · temporal → Q/Aeff

Full 20 micron x-z atom-gap material cross-section

Pole-filtered full-domain Ey field of the 2D atom-gap cavity

A y-invariant 300 nm patterned Si3N4 core inside a fixed 1 µm SiO2 stack, interrupted by a hard 1 µm air gap. The density-0.5 start first matches the fixed atom response to a solved inward TE-mode pulse; after a trustworthy atom pole and measured slowdown it hands off to replay-gated same-pole Q/Aeff. The field panel is pole-frequency filtered.

Live · fresh SiO2-slab restart · Ey

8 × 8 µm SiN/SiO2 atom slot · y dipole

Initial and live 8 by 8 micron TM atom-slot geometry

A density-0.5, component-aware Yee campaign with a hard one-micron atom strip. The SiO2 slab fills the complete x–y plane through the PMLs, while an explicit air cutout removes the entire strip. It discovers the absolute Ey temporal response, then moves through pixel-only Q, joint SiN/SiO2-thickness Q, gradual fixed-beta Q, and topology-free smooth-boundary Q. The failed z-dipole vacuum branch is preserved separately.

Parameter sweep · complete · validated

Composite Si₃N₄/SiO₂ waveguide · air-gap transmission

Coaxial composite square-waveguide air-gap geometry

Composite-waveguide insertion loss versus air gap

A fixed-port 780 nm FDTD sweep measures same-mode transmission, reflection, and uncollected power across 1–2 µm air gaps. It includes 150 nm Si₃N₄ cores in 1 and 2 µm square SiO₂ guides, a 100 nm / 3 µm slice, and SiO₂-only 1 and 2 µm controls. The stored tensors are ready to expand into a full three-parameter seed search.

Prepared · not started · air-start Yee

16 × 2 µm SiN/SiO2 atom strip · variable oxide guide width

A clean successor to the live component-aware campaign. The SiN topology starts at density zero; after temporal discovery and pixel-only Q/V, SiN thickness, exact-index-1.44 SiO2 thickness, and analytic SiO2 width optimize jointly. Beta acts only on SiN, so oxide and nitride cannot collapse into an ambiguous ternary density.

Unqualified success · Tidy3D-validated · update 2562

16 × 2 µm SiN/SiO2 atom strip · component-aware Yee landmark

Final component-aware Yee atom-strip smooth-boundary geometry

Final component-aware Yee atom-strip Ey field profiles

Frozen at accepted update 2562 with the one-micron atom-access strip intact. The exact final geometry gives Tidy3D Q=3,894, V=5.993 (λ/n_air)³, Q/V=649.8, Purcell=49.38, and λ=826.21 nm; the same checkpoint gives FDTDX Q=5,807, V=4.612, and Q/V=1,259. The complete optimizer state, smooth boundary, validation record, and immutable success archive are preserved for later continuation.

Stopped · legacy scalar-material predecessor

16 × 2 µm, 100 nm SiN in SiO2 · xyz-symmetric y atom

XYZ-symmetric cladded SiN atom-strip initial and optimized geometry

XYZ-symmetric cladded atom-strip Ey field profiles

The original density-0.5 campaign is preserved at accepted update 583 for comparison. Its scalar-material FDTDX result motivated the independent Tidy3D validation and the component-aware Yee restart above; it is no longer the running optimizer.

Qualified success · paused and resumable

16 × 2 × 0.5–0.7 µm SiN atom strip · xyz-symmetric y atom

XYZ-symmetric SiN atom-strip initial and optimized geometry

XYZ-symmetric atom-strip Ey field profiles

Paused at trustworthy Q=1,978, V=4.210 λ³, Q/V=469.9, and atom-local Purcell=35.71 after 118 accepted pole updates. Its frozen-volume Q controller ultimately reached a trust-floor plateau; the exact full-state checkpoint and immutable qualified-success archive are preserved.

Qualified success · paused and resumable

12 × 4 µm SiN atom hole · xyz-symmetric y atom

XYZ-symmetric SiN atom-hole initial and optimized geometry

XYZ-symmetric atom-hole Ey field profiles

Paused at trustworthy Q=10,057, V/λ³=61.24, atom-local Purcell=12.49, and 48.70× the handoff reciprocal guided-Purcell proxy; best observed Q was 10,499. The useful coupling gain is a qualified success, while the dielectric-centered mode and excessive Q requirement motivate the air-strip successor. Its exact optimizer state and hash-addressed checkpoint are preserved.

Paused · resumable at Q=1,767

300 nm SiN z-atom hole · one-sided V-constrained Q

One-sided SiN atom-hole initial and optimized geometry

The corrected one-sided branch reached Q=1,767 with physical atom volume 1.940 µm³ below its frozen 2.068 µm³ ceiling. Its exact optimizer state, cached trust controller, and immutable hash-addressed checkpoint are preserved for later continuation.

Landmark success · paused at Q=138,284

Fryett 16 µm nanobeam · extended-mirror lifetime

Pole-directed Fryett seed and current geometry

Pole-directed Fryett tracked cavity field

The successful temporal-to-pole sequence reached Q=6,322 in 8 µm, inferred and repeated its learned 256.589 nm outer mirror cell through a 16 µm fork, and climbed from an independently audited Q=42,361 seed to Q=138,284. The exact unbinarized 25 nm checkpoint is preserved for later binarization and smooth-boundary continuation.

Stopped after plateau audit

Fryett nanobeam · symmetric ports → central dipole

Symmetric direct-pixel port-to-dipole geometry

Fixed finite-Q ideal and simulated dipole response

An x/y/z-symmetric unit-power bright TE port pair drives a central y dipole. The sole objective is full-vector temporal MSE against a fixed 780 nm, Q=10,000, V=0.1 um3 analytical response. Each raw Adam update is one 2 ps forward/adjoint pair over 3,200 independent 25 nm density pixels; Q, V, and two-port beta are telemetry only.

Stopped at update 4

Fryett nanobeam · pulsed midpoint-guide/source Adam

Prepared simultaneous Adam field placeholder

A broadband Gaussian pulse replaces the CW-like burst. Direct 25 nm pixels start as a density-0.5 midpoint-permittivity waveguide and its solved fundamental mode source. The ideal target is recomputed as the exact causal pulse convolution with a unity-amplitude lossless cosine pole. One reverse pass returns both gradients and commits one unconditional Adam step.

Live

Fryett nanobeam · unbinarized source-equilibrated discovery

A fresh midpoint-guide campaign keeps continuous filtered density forever—no projection, beta schedule, binary pressure, or boundary handoff. The 2,700-coordinate source is locally equilibrated around every material decision while agreement-controlled trust radii grow without a scheduled release.

Stopped at Q≈781

Fryett nanobeam · frozen evolved source → smooth boundary

A rollback-safe fork freezes the evolved source, jumps directly to beta 64, and removes all source inner solves. Direct material trust-region steps rapidly test the present architecture before fail-closed replay into a smooth subpixel level-set boundary.

Paused rollback checkpoint

Fryett nanobeam · source-equilibrated dielectric

Prepared nested source-equilibrated dielectric geometry

A nested variable-projection successor starts from a 450 nm midpoint-permittivity guide in a 1 µm-wide region and equilibrates all 2,700 fixed-norm source coordinates before every material decision. Density trust and beta release slowly over accepted commits, then a stable beta-64 topology replays into a smooth cut-cell boundary.

Live

Fryett nanobeam · reciprocal modal current

Prepared neutral modal-current campaign geometry

A fixed fundamental-TE feedthrough profile is used as both the centered bidirectional electric current and its reciprocal scalar observable. One absolute causal lossless waveform drives the complete optimization, with Q≥100 pole tracking and a replay-gated smooth-boundary handoff.

Ready · not started

Fryett nanobeam · joint dielectric and source

Prepared joint dielectric and modal-current geometry

The fixed-waveform successor exposes all 2,700 physical transverse Ex/Ey/Ez source samples at fixed norm. Its dielectric is a topology-free cubic-spline phase field whose sharp limit is binary bulk plus physical gray cut cells on one continuous boundary; one reverse pass drives both trust-region L-BFGS blocks.

Live

Fryett nanobeam · lossless temporal target

Neutral eight-micron temporal-target campaign geometry

Temporal-target campaign windowed electric field

One objective from the neutral start rewards the exact source-driven lossless single-pole waveform. Raw pixel gradients rapidly binarize, a trustworthy Q≥100 pole enables carrier tracking, and a replay-gated level set takes over at the mature boundary.

Stopped

Fryett nanobeam · full-field 4D Q/V

Neutral eight-micron four-dimensional Q over V campaign geometry

Four-dimensional campaign windowed electric field

All 3,200 design pixels participate from initialization. Pulse-on-assisted discovery gives way to a fail-closed pole capture and eigenfrequency-shifted Q/V objective built from six-component fields in multiple time windows.

Stopped

Fryett nanobeam · antenna first, cavity second

Eight-micron hybrid Fryett scratch geometry

Eight-micron hybrid Fryett scratch Ey field

Stage 1 gives LDOS only a 1 µm, 320-pixel antenna box. After the antenna is frozen, Stage 2 activates 234 collective Bragg controls for Q growth and dark-state refinement.

Stopped

Fryett nanobeam · parametric → fixed-LDOS boundary

Fryett boundary-stage handoff and current geometry

Frozen 151-parameter ellipse discovery followed by topology-preserving normal-boundary optimization of LDOS at the immutable 780.550 nm emitter line.

Paused

Device 23 · anthracene LDOS

Device 23 reconstructed and optimized SiN geometry

Device 23 anthracene and SiN field profiles

Pixelated Si₃N₄ cavity below anthracene/PVA, driven by an Ey molecular emitter and optimized through shifted Q/V.

Frozen

150 nm SiN · Fourier-to-pixel

Final 150 nm SiN Fourier and pixel geometry

Large isotropic spectral discovery followed by exact pixel handoff and 1,283 total updates around a protected atom hole.

Stopped

200 nm SiN · isotropic Fourier

Thin-slab thickness experiment with full x-z field inspection and an independently doubled vertical-domain audit.

Rejected

Axis-biased Fourier seed

Twenty-update diagnostic exposing why the earlier spectral seed activated kx- and ky-aligned waves disproportionately.

Rejected

Solid-start Fourier atom hole

The 665-update solid-slab initialization study that motivated gradual, isotropic spectral discovery.

Paused

SiO₂-clad 250 nm SiN · spectral LDOS

Forty-thousand-coefficient Fourier mask with differentiable SiN and symmetric SiO₂ thickness controls.

Qualified success

12-front curved mirrors · beta

Pixel-polished facing mirrors with a frozen 53.13% two-guide coupling result and full channel accounting.

Stopped

12-front curved mirrors · LDOS

Warm-started 12-front cavity preserved after 795 LDOS updates and 294 bounded-beta updates.

Ablation

Curved mirrors · 8 / 12 / 16 fronts

Curved mirror geometries with different segment count

Curved mirror field and resonance evidence

Controlled mirror-count comparison at fixed transverse domain size, including the 12-front seed used downstream.

Study

Facing curved mirrors · parameterization

Fabricable curved alternating-material mirror geometry

Promising curved-mirror fields and resonance evidence

The geometry model distilled from the most promising intermediate structures: spacing, curvature, apodization, thickness, and embedding.

Sweep complete

Curved mirrors · 12-hour parameter sweep

Best curved-mirror sweep field and response

The broad thickness, gap, mirror-spacing, apodization, segment-count, and SiO₂-embedding screen that selected the optimization seed.

Stopped

Axisymmetric atom hole · radial Q/V

One-dimensional cosine controls revolved through 2π, with Cartesian audits exposing the reduced-model discrepancy.

Stopped

Square atom hole · waveguide beta

7.5 µm no-slot beta-first campaign with a protected central hole, attached guide, and pole surveillance.

Frozen

From-scratch atom coupler · beta first

Single-etch atom-to-waveguide topology discovery, guided branching-ratio objective, and shifted-pole continuation.

Validation

Atom coupler · beta sign-off

The independent spectrum, branching-ratio, hard-mask, and density checks applied to the beta-first final checkpoint.

Stopped

From-scratch atom cavity · LDOS first

Historical free-form LDOS campaign whose nearly static gray-material stage motivated stronger continuation controls.

Paused

One-micron atom gap cavity

The original hard-gap free-form campaign, retained with its literal geometry and evidence that the mode remained dielectric-centered.

Validation contract

Atom gap · Q and Purcell sign-off

The fail-closed replay requirements for claiming Q≥1,000 and Purcell≥5 in the one-micron dielectric gap.

Paused

Folded SiN cavity · atom-to-waveguide

Opposed 780 nm quasi-2D cavities with the exit guide inside the design region and directional-loss telemetry.

Qualified success

SiN atom slot · perpetual beta campaign

SiN atom-slot beginning and ending geometries

SiN atom-slot beginning and ending fields

The complete multi-stage beta campaign: accepted methods, rejected branches, Pareto checkpoints, and terminal morphology failure.

Final telemetry

SiN atom slot · compact checkpoint

The last literal mask, field, guided channels, loss directions, pole, and shifted-beta metrics from the stopped campaign.

Stopped

Zhang-style quasi-2D cavity · remote atom

Parametric bulge and movable-hole optimization for an atom constrained 0.5 µm from the silicon device edge.

Seed reconstruction

Zhang-style cavity · unloaded baseline

Unloaded Zhang-style photonic crystal cavity geometry

Unloaded cavity mode and remote atom LDOS field

The full paper cavity without its bus waveguide, including the pole and atom LDOS 0.5 µm from the dielectric edge.

Paused

780 nm SiN quasi-2D cavity

Material-scaled remote-atom campaign targeting a 780.24 nm resonance and enhanced evanescent coupling.

Screened

Ez bandgap · quasi-2D atom interface

Ez photonic bandgap unit cell geometry screen

Fabricability-aware slab-hole/post screen and edge taper built to couple a z-oriented atom to a quasi-2D mode.