The gds_export.lsf code is error in Large-Scale Metalens Workflow

- August 4, 2023 at 7:13 am
  
  nauval.afif
  Subscriber
  
  Hi All,
  I just downloaded the example files from Large-Scale Metalens – Ray Propagation – Ansys Optics. I follow the steps and now I am in the step of generating the GDS file.
  When I run the gds_export.lsf code without any modification, I got this error:
  It is said that it can't create a matrix with more than 2^31 values. I am using a PC with 10 cores (Intel Core-i9 10900K), and 64 GB RAM. I hope someone can help me.
  
  Thank you.
- August 4, 2023 at 10:07 pm
  
  Guilin Sun
  Ansys Employee
  
  "it can't create a matrix with more than 2^31 values"
  I guess this is your computer OS limitation as this value is the largest number it can deal with.
  GDS output for extremely large devices is very challenge as the geometry must be described as polygons. Therefore the article gives the limitation "Even with this updated workflow, the maximum size that can be simulated is limited by the RAM of the computer. With a 64Gb of RAM, the maximum size that can be generated is a metalens with a radius of a little over 10mm."
  and this is in general. For specific devices it may require more memory. I tested the gds output file on my 64bit laptop and it worked fine:
  the only concern is it spent about 2 hours while I had other files i running.