1D GaN Laser Model

laserex11.in : 1D GaN Laser Model

Requires: Blaze/Quantum/Laser
Minimum Versions: Atlas 5.28.1.R

This example demonstrates a 1D laser model, suitable for fast design of transport and gain characteristics of the active region in the vertical Y-direction. This deck assumes that the device is homogeneous in X-direction and employs a 1DY scalar Helmholtz solver to find intensity and optical field distribution. Material refractive indexes are set manually, using REAL.INDEX and IMAG.INDEX parameters on the MATERIAL statement. 3-band K.P gain/absorption model for wutizite bulk and quantum wells, set by WZ.THREE on MODELS and GAINMOD=5 on LASER statements, is used everywhere in the device. To check the spectra of gain and spontaneous emission of a particular region, LED parameter is set on the REGION statement.

The key points of this simulation are :

  • Demonstration of 1D Helmholtz solver
  • Demonstration of wurtzite 3-band k.p gain model

The results show 2D plots of total optical intensity at anode bias of 3V. The IV log file contains information of the power, photon density modal gain, modal loss and modal refractive index for the fundamental transverse mode. Spectrum log files contain information on gain and spontaneous emission spectra for the active region. Modal spectrum log files are stored when SPECTRUM is specified on the SAVE statement with "modal_" appended to the file name. Modal spectra contain modal gain, modal Rsp, modal photon density and modal lifetime for each mode.

To load and run this example, select the Load button in DeckBuild > Examples. This will copy the input file and any support files to your current working directory. Select the Run button in DeckBuild to execute the example.