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Related Experiment Video

Updated: Oct 30, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Alignment of electron optical beam shaping elements using a convolutional neural network.

E Rotunno¹, A H Tavabi², P Rosi³

¹Istituto di Nanoscienze - CNR, 41125 Modena, Italy.

Ultramicroscopy

|July 4, 2021

Summary

This summary is machine-generated.

A convolutional neural network precisely aligns an orbital angular momentum sorter in transmission electron microscopy. This accurate and fast method enables real-time tuning of electron optical devices and beam shaping.

Keywords:

Beam Shaping Convolution neural network Orbital Angular Momentum Sorter Self-Alignment

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Area of Science:

Physics
Materials Science
Optics

Background:

Transmission electron microscopy (TEM) requires precise alignment of electron optical devices.
Orbital angular momentum (OAM) sorters offer advanced electron beam manipulation capabilities.
Manual alignment of OAM sorters is time-consuming and complex.

Purpose of the Study:

To develop an automated and accurate method for aligning an OAM sorter in a TEM.
To demonstrate the feasibility of using machine learning for electron optical device alignment.
To enable real-time adjustments for improved TEM performance.

Main Methods:

Implementation of a convolutional neural network (CNN) for image analysis and alignment control.
Utilizing simulated datasets and experimental data from a TEM.
Developing an algorithm for precise positioning of the OAM sorter.

Main Results:

The CNN achieved high accuracy in aligning the OAM sorter.
The alignment process was significantly faster compared to manual methods.
Successful demonstration of the method in both simulations and experimental TEM.

Conclusions:

Convolutional neural networks provide an effective solution for aligning OAM sorters in TEM.
The developed method facilitates real-time tuning, enhancing flexibility in electron microscopy.
This approach has potential for real-time tuning of other electron optical devices and beam shaping configurations.