This is a simple but working matlab code for vibrational EELS data processing. It works only on Matlab R2019b or later versions.

Suggested publications:

• R. Qi#, R. Shi#, ..., Peng Gao*. Measuring phonon dispersion at an interface. in press (2021).
• R. Qi#, N. Li#, ..., Peng Gao*. Four-dimensional vibrational spectroscopy for nanoscale mapping of phonon dispersion in BN nanotubes. Nature Communications 12, 1179 (2021).

• 3D-EELS
  • Processing: ZLP alignment, normalization, block-matching and 3D filtering (BM3D) denoising, background subtraction, Lucy-Richardson deconvolution.
  • Visualization: Energy-filtered EELS maps and line profiles.
  • Supports user-defined custom functions
• 4D-EELS
  • Processing: Pre-processing, ZLP alignment, BM3D denoising.
  • Visualization: Dynamical plot of 4D datasets.
  • Supports user-defined custom functions

• EELS3D_TOOLBOX.mlapp: Matlab app for 3D-EELS data processing
• EELS4D_TOOLBOX.mlapp: Matlab app for 4D-EELS data processing
• 3DEELS: Functions used for 3D-EELS data processing
• 4DEELS: Functions used for 4D-EELS data processing

Used 3rd-party packages:

• BM3D (Image and video denoising by sparse 3D transform-domain collaborative filtering | Block-matching and 3D filtering (BM3D) algorithm and its extensions (tuni.fi))
• npy-matlab (kwikteam/npy-matlab: Experimental code to read/write NumPy .NPY files in MATLAB (github.com))

• Ruishi Qi: rs-qi(at)pku.edu.cn
• Prof. Peng Gao: p-gao(at)pku.edu.cn