The next update in Photon Design’s decades serving FDTD arrives to further support the photonic crystal laser designer in OmniSim 8.2.
 

Designers can simulate gain spectra using ‘Harold’, Photon Design’s thorough semiconductor laser simulator, to perfect their epitaxy stack. Results of these simulations fuel OmniSim’s model for a Dynamic Gain Model in this new update, simulating carrier diffusion and how how this effects gain.

• Photinic Crystal Lasers and PCSELs in OmniSim with improved Dynamic Gain Model:
  Thorough gain spectra simulations from Harold (.gain files) may now be specified in a .mat file, and a fitted dynamic gain model may be saved for use in an active-FDTD calculation without needing to export it to a .mat file.
   
• Mode Solvers in OmniSim
  The effective index solver used by mode excitors and sensors has been replaced by a finite-difference mode solver, providing greater accuracy.
   
• Improvements to the excitation window: the spatial profile and time envelope of an excitor may be viewed separately, before running a time-domain calculation.
   
• Physical and process layers may now be defined without reference to a particular device, using a fab node. A fab model defined in a fab node may be shared by multiple devices.
   
• CrystalWave has been fully incorporated into OmniSim, and there is no longer any distinction between OmniSim and CrystalWave devices
   
• Additional bug fixes thanks to community feedback