Cathodoluminescence Wavefront Retrieval
Abstract
Free-electron-based nanoscopy enables the study of optical excitations in materials with deep-subwavelength spatial resolution, with cathodoluminescence (CL) being one of the most useful resulting signals. When combined with an optical collection system, CL measurements can access multidimensional information of light; yet the phase of the emitted optical fields has remained largely elusive. Here, we demonstrate a reference-free phase retrieval approach for far-field CL wavefronts using the Gerchberg-Saxton algorithm implemented with real-space and angular-space CL intensity data. Applying this approach to representative nanostructures, including a planar surface, nanosphere, plasmonic crystal, and nanowire, we reconstruct distinct phase distributions that reveal their underlying radiation mechanisms. This reference-free framework offers a robust and flexible route for retrieving the phase of electron-beam-excited optical fields without relying on a reference wave, making it readily extendable to a wide range of nanostructures.
Versions
Related
- Model-constrained nanoscale 3D cathodoluminescence reconstruction of InGaN LEDs via coupled electron–photon transport
- Observation of Size-dependent Optical Modes and Confinement in Fin Cavities using Angle-Resolved Cathodoluminescence
- Spectral properties of orthorhombic KSbOSiO4 crystals: studies of infrared, visible and ultraviolet radiation absorption, Raman scattering, cathodoluminescence and photoluminescence
- Pupil Design for Computational Wavefront Estimation
- Long-Wave Infrared Wavefront Sensing based on Background-oriented Schlieren
BibTeX
@misc{machfuudzoh2026cathodoluminescence,
title = {{Cathodoluminescence Wavefront Retrieval}},
author = {Izzah Machfuudzoh and Ryoichi Horisaki and Takumi Sannomiya},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2605.21944},
eprint = {2605.21944},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.21944},
}
RIS
TY - UNPB
TI - Cathodoluminescence Wavefront Retrieval
AU - Izzah Machfuudzoh
AU - Ryoichi Horisaki
AU - Takumi Sannomiya
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2605.21944
UR - https://arxiv.org/abs/2605.21944
AB - Free-electron-based nanoscopy enables the study of optical excitations in materials with deep-subwavelength spatial resolution, with cathodoluminescence (CL) being one of the most useful resulting signals. When combined with an optical collection system, CL measurements can access multidimensional information of light; yet the phase of the emitted optical fields has remained largely elusive. Here, we demonstrate a reference-free phase retrieval approach for far-field CL wavefronts using the Gerchberg-Saxton algorithm implemented with real-space and angular-space CL intensity data. Applying this approach to representative nanostructures, including a planar surface, nanosphere, plasmonic crystal, and nanowire, we reconstruct distinct phase distributions that reveal their underlying radiation mechanisms. This reference-free framework offers a robust and flexible route for retrieving the phase of electron-beam-excited optical fields without relying on a reference wave, making it readily extendable to a wide range of nanostructures.
ER -