OmniSim - UK Silicon Photonicsomnisim -英国硅光子学

Sub-gridding
• Photon Design first to demonstrate an efficient, stable sub-grid algorithm in FDTD – all previous published algorithms not stable. • Increase local resolution by 2x, 4x, 8x, … • Can accelerate a 3D simulation by 64x or more. • Much more efficient than “variable grid” FDTDs – a diagonal of small features would create a fine grid everywhere.
Mode Excitors and Sensors
mode excitor
• Import precise mode from FIMMWAVE for mode launch • Ditto import for mode sensor => Substantially decrease simulation volume/time. mode sensor
mode computed in FIMMWAVE
Example - ring resonator design/simulation
• Editor allows very easy layout of even the most complex ring structures • Simulation with time or frequency domain
The next generation in photonic layout & simulation
“propagating ideas”
What is OmniSim ?
• Truly direction agnostic layout and simulation tool • Time domain engine •2D & 3D FDTD •generate spectral response in a single simulation • Frequency domain engine • new algorithm brings unparalleled speed • Automatic optimisation •evolves your design while you eat lunch ! • Mask export using GDSII
“propagating ideas”
The Mask Editor
•Free rotation of almost all objects •Powerful constraint system •Hierarchical framework •n-level undo/redo •Supports etch and growth processes •Export to mask file
Leabharlann Baidu
“propagating ideas”
OmniSim Features Summary
• OmniSim contains a sophisticated layout editor
• Complex 3D devices can be built up using physical layers and process concepts
• Elements can be rotated and linked to each other • A wide range of sources and sensors are available • Can import a FIMMWAVE mode for launching or measuring mode power – substantially increases simulation efficiency. • The frequency domain method offers a rapid technique for simulating devices • The FDTD technique is able to simulate either at CW or over a broadband • Kallistos can be used to optimise a device
• The final design can be exported as GDSII data
OmniSim FDTD Engine Features
General • The fastest FDTD engine in the field • Sub-gridding – substantially reduce memory and time required c.f. variable grid FDTDs. • Many memory reducing technologies • Cluster system for distributing simulation across multiple CPUs/PCs Materials • Anisotropy – general symmetric tensor. • Dispersive materials including metals – Drude/Debye/Lorentzian models with automatic fitting tool (you just provide a dispersion curve). • Chi2 and Chi3 non-linearity • Permeability (magnetic materials) Boundary Conditions • High performance PMLs on 6 faces • Dispersive PMLs – e.g. continue a metal layer into the PML • Metal, magnetic and periodic boundary conditions