Mirage software automates design of optical metamaterials

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Sandia National Laboratories has created the first inverse-design software for optical metamaterials — meaning users start by describing the result they want, and the software fills in the steps to get there. The modern design approach takes guesswork out of engineering as-yet theoretical technologies like ultracompact, high-performance cameras and cloaking armor that could make wearers invisible to detection.

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Intelligent Symmetry Engine:

  • Mapping of symmetry to constitutive tensor and optical properties
  • Expert , Guided and Templated build modules
  • Library of meta-atoms and unit cells
  • State of the art CAD with all geometrical primitives and Boolean operations to achieve arbitrary meta-atoms designs
  • User based material assignment to segments of atoms
  • Automatic physical meshing based on material refractive index
  • Pick-and-place arbitrary 3D heterogeneous-unit cell tiling & stitching
  • Arbitrary layered super- and substrates
  • Periodic table of meta-atoms, unit cells, and molecules
  • Supports all space filling tiles in 2D, 2.5D and 3D systems
  • Algebraic expressions for dimensional dependencies

Smart Efficient Multiscale Electromagnetic Simulation Engine:

  • V&V on literature from Microwave-to-optical domains
  • Ability to extract and track diffraction orders
  • Automatic phase unfolding
  • Data processing and extraction of physical properties including: S-parameters, phase, volumetric fields distribution power, pointing vector, field intensity, surface charge density, quiver plots.
  • Exportation of tabulated CVS data and gif temporal time propagation
  • Handling of perturbative nonlinearity
  • User friendly scripting interface for exotic anisotropic material properties including: anisotropic and, dispersive media, gyrotropic media, ferrites with bias fields, graphine, and nonlinear susceptibility
  • Analytic determination of SALC resonant modes pre-simulation
  • Symmetry-based meta-atom periodic table for the design of meta-surfaces and lenses
  • Adjoint based source inversion and masking
  • 1mm2 metalens simulation

Guided flexible Optimization Engine:

  • Incorporation of DAKOTA geometric optimization package
  • Engagement of optimization method via simple mouse clicks in an optimization GUI
  • Canned objective functions and exemplar scripts for user guidance
  • Exposing of all compute quantities including spatial fields vectors and s-parameters to user for defining custom objective functions
  • Automatic propagation of assigned dynamic variables to optimization module
  • Run-time history showing geometric evolution of structure at various stages
  • User ability to upload measured data and use optimization module forensic tool to deduce structural dimensions
  • Incorporation of sensitivity analysis and uncertainty quantification for yielding robust solutions
  • Single and multi-objective optimization with user defined weights
  • Generation and exportation of optimization Pareto-Fronts
  • Incorporation of adjoint formulation and the enabling of exotic inversions including:
  • Source inversion
  • Source masking via active control
  • Target inversion
  • Tensor inversion (numerical homogenization)

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