Advancing Micro-LED Technology with Lumerical Stack Simulation: An In-Depth Technical Guide
Hello, this is Majid Heydari from Ozen Engineering, Inc. Today, I would like to discuss the use of the Lumerical Stack for designing micro-LEDs. I will demonstrate how to design a multi-layer micro-LED using the numerical stack and calculate essential parameters such as the personal factor, power density, and terrestrial values.
Introduction to Micro-LED Design
The micro-LED design we will discuss today is based on information available on the ANSYS website. You can find detailed information there, but I will outline the key aspects of using the numerical stack for this purpose.
Layer Composition
- Gallium Arsenide
- Aluminum Gallium Indium Phosphide
- Aluminum Indium Phosphide
- Other layers and parameters
The top line relates to the thickness of each layer, which I will demonstrate how to input into the numerical stack.
Using the Lumerical Stack GUI
The Lumerical Stack GUI allows us to define materials, their thickness, and properties. We can access results such as field, dipole, personal factor, and more. You can specify the wavelength range and view layer information, geometry, and stack results like radiance, luminance, and personal factor.
Software Setup
- Open ANSYS Optics.
- Select solvers like FDTD, Stack, and RCWA.
- Create a new project in the Stack solver.
- Right-click on the stack and edit the object to insert layers with their properties.
Layer Configuration Example
For instance, you can configure layers as follows:
- Layer 1: 1 micrometer, Material: Aluminum
- Layer 2: 1.5 micrometers, Material: Indium Phosphide
You can define different values for angles, frequencies, or wavelengths, and switch between wave frequency and wavelength views.
Running Simulations
For efficiency, I have pre-designed an example. By opening this existing example, we can see the configured layers:
- First Layer: Gallium Arsenide
- Second Layer: Aluminum Gallium Indium Phosphide
- Third Layer: Aluminum Indium Phosphide
Simulation Parameters
Key parameters include:
- Dipole placement: Middle of Layer 5 with a thickness of 0.18 micrometers
- Orientation: Random
- Wavelength range: 0.55 to 0.7 micrometers
- Number of points: 500
Results Visualization
After running the simulation, we can visualize various parameters:
- Radiance and Luminance
- Stimulus values: X, Y, Z
- Personal factor across wavelengths
- Power emitted to the air and earth
Conclusion
The Lumerical Stack provides a comprehensive tool for simulating and analyzing micro-LED designs. By utilizing its features, we can gain a clear understanding of different layers and their properties, ultimately enhancing micro-LED technology.
Thank you for joining this numerical stack demo. I hope you found it informative.
Advancing Micro-LED Technology with Lumerical Stack Simulation: An In-Depth Technical Guide Hi, this is Majid Heidari from Ozen Engineering. Today, I would like to discuss numerical stacks and their application for micro-LED design.
I will show you how to design your multi-layer micro-LED with a numerical stack and how to calculate the personal factor, power density, and other important parameters for micro-LED design. The micro-LED I would like to discuss today is based on this link.
You can find the details on the ANSYS website.
The information I would like to insert in the numerical stack is as follows: * Different layers: Gallium Arsenide, Aluminum Gallium Indium Phosphide, Aluminum Indium Phosphide, and other parameters * Thickness of each layer Here is the stack, the GUI of which looks like this: In this part, we can define a material (thickness, material property), access results (field, dipole, personal factor), and see the results.
We can put the wavelength range here and find layer information (layer, geometry). Here are the stack results (radiance, luminance, personal factor, and power emitted to the earth). Now, let's go to the software and show you how to design it.
In ANSYS Optics, you can find different solvers on the solver side, such as FDTD Stack and RCWA, which belong to the numerical FDTD. Let's open the stack and create a new project. You can see the solver here.
If you right-click on the stack and edit the object, you can insert layers with information, such as layer one, with a thickness of one micrometer and material (e.g., aluminum).
You can define different layers and put different values for angle, frequency or wavelength, and change the shape from wave frequency to wavelengths. Here is an existing example that I designed before to save time. I will open it and show you the results. You can see all the layers inserted here.
The first layer is Gallium Arsenide, Aluminum Gallium Indium Phosphide, Aluminum Indium Phosphide, and so on. Here is the line to my signal. You can see the method called "Yuri" and the triangular plot. The last line shows the cell volume. Now, let's define a layer around the dipole.
The thickness of layer 5 is 0.18 micrometers. I put the dipole in the middle of that and chose the orientation as random. I want to run the simulation from wavelengths of 0.55 to 0.7 for 500 number of points. For the pear cell, I put the same position of the dipole. Here are the field parameters.
Let's run the simulation. You can see the results, such as dipole, radiance, luminance, and trisomal s versus theta. If you right-click on it and visualize a new visual, you can see that it is very bright. Here are the different parameters, such as blue for radiance and green for luminance.
You can remove the rows and keep moving them. This is just for luminous. You can see the luminous value, radiance value, x3 stimulus y3 stimulus, and z 1. About the personal factor, you can right-click and visualize a new visualize on a personal factor.
You can change the x-axis to wavelength and the unit to micrometers. This is the personal factor for the wavelengths of 0.55 to 0. 7. You can also look at the power emitted to the air and change the f to the lambda and then to micrometers. Here is the power emitted to the earth.
You can see the index value in the dipole. You can change the index, the unit to micro. You can write an X script and export it to the script. Without using the GUI, you can access the screen and change the parameters. You can run it and visualize the parameter.
I hope you enjoyed this numerical stack demo. Thank you.
