SHG Simulation Package

The purpose of this package is to assist the Condensed Matter Physics community work efficiently with Rotational-Anisotropic Second-Harmonic Generation (RA-SHG):

1. Easier confirmation of RA-SHG experimental results with an all-in-one package.
2. Quick visualization of the symmetries of quantum materials.
3. Simulation of the nonlinear optical response for the electric dipole (ED), electric quadrupole (EQ), and magnetic dipole (MD) radiation sources.

Check our poster: Link

Note: This package is for academic and educational research (WITHOUT WARRANTIES, our software does not collect any data from users).

Requirements

1. This package is compatible with Python 3.7 or newer.
2. Latex is required on all platforms:
   1. Windows users need to install Latex before running the program (MiKTeX).
   2. Mac and Linux users can install the package by simply running StartGui.py or install before running.
3. We tested the program on Python version 3.9-3.11 on M1 Mac (macOS 13.4.1), Intel Mac (macOS 12.6.7), Windows (win 10 & 11), and Linux (Ubuntu 22.04 LST) Machines.

Setup

Create a new virtual environment based on your Python version:

First, create a Python virtual environment:

sudo apt install python3.xx-venv
python3 -m venv name

Second, activate the environment:

source name/bin/activate

linux common issue (tested on Ubuntu):

1. Latex

sudo apt install texlive-latex-extra

2. Latex extra package

sudo apt install cm-super

3. Matplotlib missing file

sudo apt install dvipng

4. install idle library:

sudo apt install idle3

Note: Linux users can run StartGui.py to install all the required packages.

Running

1. Run from the Python IDE using code StartGui.py.

Expression and Latex

1. All the expressions can be found under SHG-Simulation/ExpressAndLatex/.

Update Notes

New Features in Version 0.5.0 include:

*   New feature of Orientation selection
*   An initialization file to install all the required packages 
*   Combining the running files into one file
*   Improving the calculation model and updating Logo
*   Relocating all the calculation functions into separate folders
*   Improving the symbolic format calculation by using Cython package symengine
*   Small modifications to improve user interface and enhance user experience

Version 0.0.1

*   Thanks for supporting us and we released our first beta for users to test
*   General Rotational Anisotropy - Second Harmonic Generation simulation on four different channels

About us

Our group focuses on studying novel phases of matter in low-dimensional quantum systems. We exploit a variety of experimental techniques, such as femtosecond laser-based nonlinear optical spectroscopy and synchrotron-based photoemission spectroscopy/microscopy, to investigate the electronic and magnetic structure at the surface and interface.

Contact

This project is contributed by:

• Chunli Tang (Auburn University – Electrical and Computer Engineering: chunli.tang@auburn.edu)
• Hussam Mustafa (Auburn University – Physics Department: hnm0037@auburn.edu)

Advisor:

• Dr. Masoud Mahjouri-Samani (Auburn University – Electrical and Computer Engineering: Mahjouri@auburn.edu)
• Dr. Wencan Jin (Auburn University – Physics Department: wjin@auburn.edu)

Join our SHG Simulation Software Google group: shg-simulation-package@googlegroup.com