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            round pillars
    polarization insenstive       ![]()
      rectangular pillars
  for circular polarization ![]()
          cross-type pillar
x-arm length TM polarization y-arm length TE polarization       ![]()     heat map plot showing     transmission vs pillar height     calculated using RCWA     Pillar height selected for     good transmission across     pillar radii ![]()     phase vs pillar radius     calculated using RCWA     Pillars from 0-to-2pi phase     are selected and saved in     a meta-atom library     to use as building blocks     for metasurface layout ![]()
  englarged GDS mask showing
  meta-atoms placed at positions   in the metasurface to minimize   target wavefront error ![]()
    rectangular and cross-shape
    meta-atoms placed at each     position on the surface     according to the phase with     the lowest target wavefront     error       ![]()
GDS mask showing metasurface
layout with weighted optimization to split TE and TM polarization
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PlanOpSim Metasurface Simulation and Design
Easiest metasurface design software
    PlanOpSim software was developed specifically for metasurface
        simulation and design.     The graphical user interface is intuitive, making it easy to learn and use.     Easy to import near-field and far-field targets, change settings,         reanalyze designs, optimize designs by running parameter sweeps         with multiple variables, layout metasurfaces and export GDSII         fabrication files.     The workflow is logical and easier than script-based software.     Contact us to request a detailed workflow comparison Features of PlanOpSim MetaCell     Create subwavelength pillars and meta-atom pillar groups.     Metasurface pillar shapes:         round - polarization insensitive         rectangular - polarization sensitive by rotation         cross - more polarization control by rotation and x, y dimensions     Full wave Maxwell solver to calculate the phase of individual meta-atoms         and diffraction efficiency of periodic structures     Rigorous Coupled Wave Analysis (RCWA)     Plot heat map showing transmission (in red) vs pillar height         and radius         Choose pillar height for transmission across range of pillar sizes         and for practical fabrication size     Plot phase vs pillar radius to select pillars from 0-to-2pi phase         to include in a meta-atom pillar group     Store meta-atom pillar groups in a library for convenient metasurface         layout, as described in the next section on the MetaComponent         program     The library can contain meta-atom pillar groups with different pillar         shapes for designing complex, multifunction wavefront targets         and for dispersion engineering.     Contact us to request RCWA vs FDTD speed and accuracy comparison Features of PlanOpSim MetaCell + MetaComponent     The MetaComponent program is for importing near-field and far-field     targets, conveniently laying out metasurface structures,     exporting GDSII fabrication files and exporting metasurface     designs to Zemax.     Near-field design - two ways:         Input Zemax wavefront surface response (binary2 surface)         Input near-field phase as an analytical expression, in a             Python script to create a customized wavefront     Far-field design - and IFTA         For far-field design a target pattern can be imported, such as a JSON             image file.         Iterative Fourier Transform Algorithm (IFTA) is used to create             metasurface phase designs from a far-field pattern.             IFTA starts by creating a random phase distribution             in the near-field, based on far-field amplitude input.             The projected pattern is evaluated against the target, and each             iteration improves the phase design until a desired pattern             is developed.             It takes PlanOpSim just seconds to develop, evaluate and improve             mutiple metasurface phase designs.     Parameter sweep         The Parameter Sweep in PlanOpSim is used to optimize designs for         best performance, based on design criteria, and for fabrication         tolerance analysis.             Minimum and maximum ranges for each parameter can be             specified, as well as the number of steps to vary in each range.             Parameters can be varied linearly or randomly.             The Parameter Sweep also makes it easy to see how performance             changes when varying such parameters as wavelength             and angle of incidence.             Results, including spot size, spot location and wavefront can be             shown quickly, and they can be viewed dynamically using a             separate slider bar for each variable.     Export GDSII fabrication files         The finished metasurface design is used to export a GDSII             fabrication file.         Shown on the left are three examples of GDSII masks.             round polarization-insensitive pillars             both rectangular and cross pillars             weighted optimization to split TE and TM polarization                 and focal spot locations         Click on each image to enlarge it.     Zemax Import         Importing Zemax binary 2 files into PlanOpSim for metalstructure             applications extends Zemax ray tracing to fully vectorial physical             optics modeling and physical structure designs. Types of User Licenses PlanOpSim software is available for online operation or with a dongle for     local operation. User licenses can either be permanent or annually renewable     subscriptions. Subscription user licenses can reduce initial cost, offer longer, more     thorough software evaluations or provide practical solutions     for short-term projects. Subscription user licenses can be converted to permanent licenses
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