Photonic Crystal VCSEL


#1

By: “Behzad Khanaliloo, Support Engineer at Lumerical Solutions, Inc.”

Introduction:

Vertical-cavity surface-emitting lasers (VCSELs) require lateral mode control for high performance optical communication systems. This can be achieved by utilizing a 2D PC cavity, details of which is explained in this article. In this thread I will provide the 2D and 3D simulation files for the geometry explained in the PC VCSEL white paper.


simulation files:

pc_vcsel_2d.fsp (421.2 KB)

pc_vcsel_analysis_2d.lsf (3.7 KB)

pc_vcsel_3d_symmetry.fsp (460.7 KB)

pc_vcsel_analysis_3d.lsf (3.2 KB)


References:

http://aip.scitation.org/doi/pdf/10.1063/1.1577835


Simulation methodology and results:

Here I am using a coarse mesh for quicker simulations. You will need convergence testing to make sure that the results are converging with finer mesh. You can use resonance finer analysis group to find the supported resonance modes for different mesh cells, and update the frequency of the profile-mode monitor accordingly. Here are the initial results (coarse mesh) with 2D and 3D simulations:

2D

image

image

3D

image

image


Advanced notes and tips:

Simulation results varies with mesh size and simulation time. A good strategy to mesh the structure is to make sure that all the holes are treated similarly. This approach is explained in this link:
https://kb.lumerical.com/en/index.html?diffractive_optics_pc_discussion_results.html

Below is the result obtained with a finer mesh and longer simulation time and shows a very good agreement with the results reported in the paper:

3D


Example of PC-VCSEL simulation
请问mode solution 可以模拟MQW吗
#2

Please visit the link below for an updated version of the PC VCSEL application example that uses a new saturable gain material plugin model to excite the cavity:

Photonic Crystal VCSEL simulations