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      round pillars

              round pillars
      polarization insenstive

      rectangular pillars

          rectangular pillars
      for circular polarization

cross-type pillar

          cross-type pillar
x-arm length TM polarization
y-arm length TE polarization

      transmission vs pillar height at 650 nm

    heat map plot showing
    transmission vs pillar height
    calculated using RCWA
    Pillar height selected for
    good transmission across
    pillar radii

phase vs radius at 650 nm

    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

GDS mask enlarged

  englarged GDS mask showing
  meta-atoms placed at positions
  in the metasurface to minimize
  target wavefront error

metasurface layout

    rectangular and cross-shape
    meta-atoms placed at each
    position on the surface
    according to the phase with
    the lowest target wavefront

      metasurface layout

GDS mask showing metasurface
layout with weighted optimization
to split TE and TM polarization
PlanOpSim Metalens Simulation and Design Software

Metalenses are increasingly replacing conventional lenses for imaging, sensing and display applications, because they are flat lenses with many degrees of design freedom that can simplify and reduce the size of optical systems.
Metalenses can control the amplitude, phase and polarization of light. They can be designed for large FOV, achromatic correction, polarization sensing and control and complex wavefront patterns.

There are several ways to fabricate metalenses, depending on the application, the materials and the production facilities.
E-beam lithography by scanning an electron beam is typically used for low-volume laboratory applications.
Photo lithography, using a mask, similar to semiconductor manufacturing, is for high volume applications.
Nano-imprint lithography is a pattern transfer method which mechanically creates a pattern in a soft material, such as a polymer. The material is then cured by UV light.

Easy to use
Optical engineers can work efficiently with PlanOpSim metalens simulation and design software, because it was developed specifically for metalens applications. The workflow is logical and intuitive for metalens simulation and design.
PlanOpsim is the only optical design software that includes a graphical user interface for all the steps in designing metalenses. This includes: creating meta-atoms and substrate structures, storing them in libraries, creating near-field or far-field targets, laying out metasurfaces, optimizing final designs and exporting GDSII fabrication files.
It is easier to learn and use than software with scripts or a combination of scripts and a graphical interface.
    Contact us to request a competitive workflow comparison
Both new and experienced metalens designers can easily modify configurations (e.g. materials, pillar shapes, dimensions, incident light) for performance comparison, and they can dynamically change multiple variables for optimization, tolerancing and manufacturability.
PlanOpSim is your source for both software and expert support by a team that specializes in metalens design and applications.

Two program modules.
PlanOpSim software includes two program modules.
The MetaCell program module is for creating pillar structures and substrates, creating meta-atom groups from pillars, storing meta-atom groups in a library for metasurface layout.
The MetaComponent program module is for creating a near-field or far-field wavefront target, creating metasurface designs, optimizing the final design, laying out the metasurface using a meta-atom group from the library and exporting a GDSII fabrication file.

Features of PlanOpSim MetaCell program module
    Create subwavelength pillars and meta-atom pillar groups.
    Metasurface pillar shapes included:
        round - polarization insensitive
        rectangular - polarization sensitive by rotation
        cross - more polarization control by rotation and x, y dimensions
    Full wave RCWA Maxwell solver to calculate the phase and transmission
        of meta-atoms
    Plot heat map showing transmission (in red) vs pillar height and radius
        Choose pillar height for maximum transmission across a range
        of pillar sizes and for practical fabrication height.
    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 module.
    The library can contain meta-atom pillar groups with different pillar
        shapes for designing complex, multifunction wavefront targets,
        for polarization control and for achromatic design by dispersion
    Ask us for use cases describing polarization control and dispersion

    Contact us to request RCWA vs FDTD speed and accuracy comparison.

Features of PlanOpSim MetaComponent program module
    The MetaComponent program is for importing near-field and far-field
    targets, conveniently laying out metasurface structures using the
    meta-atom library created in the MetaCell program, 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 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

To contact HMS Technology Sales for more information click here