Inverse-designed cavities and atom interfaces

Inverse-designed cavities and atom interfaces#

High-Q nanobeams, remote-atom cavities, curved mirrors, atom-gap designs, and their validation records.

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Nanobeam cavity — resonant wavelength and Q

PASS · executed notebook · forward · wavelength_um

Nanobeam cavity: resonant wavelength and quality factor
GPU-native inverse design of a high-Q nanobeam cavity

PASS · executed notebook · invdes · validated_q_ratio

Inverse design of a high-Q nanobeam cavity
Binary atom-gap antenna coupled to a feedthrough waveguide

PASS · benchmark page · invdes · guided_beta

Binary atom-gap antenna coupled to a feedthrough waveguide

Optimization campaigns, precursors, and audits#

Everything associated with inverse-designed cavities is collected here, including paused and negative campaigns.

Silicon (1550 nm) · executed remote-atom shifted-LDOS notebook

Complete parameter → geometry → simulation → optimization → field-analysis notebook.

Shape optimization of a remote-atom silicon cavity
Lossless temporal-target Fryett campaign

One source-driven single-pole waveform objective from a neutral start, followed only by pole tracking and a replay-gated smooth-boundary handoff.

Lossless temporal-target cavity campaign
Four-dimensional shifted-ringdown Q/V campaign

A neutral full-domain 8 um Fryett search using six-component fields across pulse-on and source-off time windows, followed by a fail-closed eigenfrequency-shifted Q/V stage.

Four-dimensional shifted-ringdown Q/V campaign
Live axisymmetric atom-hole LDOS optimizer

A z dipole in an immutable 1 µm air hole, optimized from a neutral radial line with exact m=0 cylindrical symmetry, robust projection, literal fields, and automatic pole surveillance.

Axisymmetric cosine atom-hole optimizer
Frozen SiN atom-slot beta campaign

The complete qualified-success record: every optimization stage, parameters, starting and final masks, paired fields, pole history, Pareto alternatives, and the robust-projection failure that ended the campaign.

Frozen SiN atom-slot beta campaign
Frozen SiN atom-slot telemetry

The final literal-mask dashboard retained as a compact view of the stopped 780.24 nm Ez campaign.

Cold-start SiN atom-slot beta optimizer
Live folded-SiN atom-to-waveguide beta optimizer

The 780.24 nm Ey/TE-like one-sided coupler, with literal mask, field, beta, LDOS, Q, pole, and directional-loss telemetry.

Live folded-SiN atom-to-waveguide optimizer
Ez-bandgap quasi-2D atom interface

The replacement z-dipole campaign: unit-cell gap, thickness screen, tapered post edge, PML stability audit, and full 3D Ez fields.

Ez-bandgap quasi-2D atom interface
Silicon (1550 nm) remote-atom optimization campaign

The stopped shifted-LDOS run, with its literal geometry, history, fitted pole, and Ey field.

Frozen shifted-LDOS optimization · remote atom
Silicon nitride (780 nm) quasi-2D optimization campaign

The 780.24 nm single-etch campaign, paused at its last accepted checkpoint.

Live quasi-2D SiN remote-atom optimizer
Atom-gap cavity optimizer

The original hard-gap free-form cavity campaign and its field evidence.

Atom-gap cavity optimizer dashboard
Beta-first atom-to-waveguide optimization

The guided-coupling-first campaign used to seed later pole optimization.

Beta-first atom-gap inverse design
Beta-first final validation

Fail-closed geometry, spectrum, branching-ratio, and density checks.

Beta-first final validation
From-scratch atom-LDOS optimization

The historical LDOS-first campaign and diagnosed gray-material stall.

Live atom-LDOS fabrication dashboard
Atom-gap final-validation contract

The independent evidence required before Q and Purcell targets are claimed.

Ey atom-gap cavity · final independent validation
Stopped square atom-hole waveguide campaign

The preserved 7.5 um no-slot beta-first campaign, including its final geometry, fields, and pole telemetry.

No-slot atom-hole waveguide inverse design
Zhang-style semi-2D cavity reconstruction

The unloaded paper geometry and remote-atom LDOS baseline used before shape optimization.

Zhang et al. semi-2D PhC cavity
Facing curved-mirror cavity study

The parameterization and fabrication model for the observed (((  ))) family.

Facing curved-mirror atom cavity
Curved-mirror parameter sweep

Thickness, spacing, apodization, oxide embedding, LDOS, and pole comparisons.

Live curved-mirror cavity sweep
Mirror-count doubling ablation

The controlled test of additional Bragg fronts at fixed transverse domain size.

Mirror-count doubling ablation
Stopped 12-front curved-mirror live record

The final live checkpoint from 795 LDOS and 294 bounded-beta updates.

Live 12-front curved-mirror beta inverse design
Final 12-front curved-mirror beta campaign

Frozen 53.13% two-guide beta result with geometry, fields, channels, spectrum, and history.

Final 12-front curved-mirror beta campaign
Archived solid-start Fourier atom-hole campaign

The rejected 665-update initialization study and the evidence motivating gradual spectral discovery.

Archived solid-start Fourier atom-hole campaign
Archived axis-biased Fourier seed campaign

The stopped 20-update seed audit that exposed excess coordinate-axis spectral power.

Archived axis-biased Fourier seed campaign
Live isotropic-Fourier thin-SiN campaign

A large 150 nm SiN design with 40,000 Fourier coefficients, a hard 1 um atom hole, and live fields.

Live isotropic-Fourier SiN/SiO2 sandwich atom-hole optimization