Category Ranking

98%

Total Visits

921

Avg Visit Duration

2 minutes

Citations

20

Article Abstract

Cathodoluminescence microscopy is now a well-established and powerful tool for probing the photonic properties of nanoscale materials, but in many cases, nanophotonic materials are easily damaged by the electron-beam doses necessary to achieve reasonable cathodoluminescence signal-to-noise ratios. Two-dimensional materials have proven particularly susceptible to beam-induced modifications, yielding both obstacles to high spatial-resolution measurement and opportunities for beam-induced patterning of quantum photonic systems. Here pan-sharpening techniques are applied to cathodoluminescence microscopy in order to address these challenges and experimentally demonstrate the promise of pan-sharpening for minimally-perturbative high-spatial-resolution spectrum imaging of beam-sensitive materials.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12133309PMC
http://dx.doi.org/10.1515/nanoph-2024-0724DOI Listing

Publication Analysis

Top Keywords

cathodoluminescence microscopy
12
beam-sensitive materials
8
materials
5
non-perturbative cathodoluminescence
4
microscopy beam-sensitive
4
materials cathodoluminescence
4
microscopy well-established
4
well-established powerful
4
powerful tool
4
tool probing
4

Similar Publications

We applied micro-computed tomography, high-resolution cryo-scanning electron microscopy (SEM) combined with cathodoluminescence, and cryo-focused ion beam Milling-SEM to perform three-dimensional imaging of human atherosclerotic tissues with tens of nanometers resolution, under hydrated, near-native conditions with minimal sample processing. The same technology was applied to cultured macrophages exposed to cholesterol crystals, and the observations made on the macrophages were compared to those made on the pathological tissue. We observed that cholesterol crystal digestion and, eventually, cholesterol crystal clearance occurs in the advanced human plaques through cellular processing.

View Article and Find Full Text PDF

High-energy electron beams with energies in the 15-30 keV range are used to excite optical Mie modes in crystalline Si nanospheres with radius 80-100 nm. Cathodoluminescence (CL) spectra show emission from resonant electric and magnetic dipole and quadrupole modes, with relative intensities that depend strongly on electron energy and impact parameter. The measured trends are explained by a coupling model in which the electron-energy dependent CL excitation probability-and thus the CL emission-is proportional to the Fourier transform of the modal electric field at a spatial frequency determined by the electron velocity.

View Article and Find Full Text PDF

Surface plasmon polaritons (SPPs) can be manipulated to localize and guide light in subwavelength distances, enabling them to find applications in a wide range of areas, from sensing to quantum computing. Among several methods of SPP excitation, periodic arrays of nano- and microstructures are of particular interest, as they enable engineering SPP properties through structural parameters. Here, using the photon-induced near-field electron microscopy (PINEM) technique, we investigated the mode formation, coupling, interference, and decay of SPPs in square and hexagonal arrays of circular nanoholes under both visible and near-infrared excitation.

View Article and Find Full Text PDF

An atlas of photonic and plasmonic materials for cathodoluminescence microscopy.

Nanophotonics

August 2025

POLIMA - Center for Polariton-Driven Light-Matter Interactions, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.

Cathodoluminescence (CL) microscopy has emerged as a powerful tool for investigating the optical properties of materials at the nanoscale, offering unique insights into the behavior of photonic and plasmonic materials under electron excitation. We introduce an atlas of bulk CL spectra and intensity for a broad range of materials used in photonics and plasmonics. Through a combination of experimental CL microscopy and Monte Carlo simulations, we characterize spectra and intensity of coherent and incoherent CL, electron penetration depth and energy deposition, offering a foundational reference for interpreting CL signals and understanding material behavior under electron excitation.

View Article and Find Full Text PDF

The study of lithic raw material procurement strategies provides critical insights into the socio-economic organization and territorial mobility patterns of prehistoric societies. This research applies a pioneering geoarchaeological approach by combining advanced analytical techniques, including polarized optical microscopy (POM), cathodoluminescence microscopy (CL), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF) to characterize archaeological and geological flint samples from Ardales Cave and Sima de las Palomas in southern Iberia. The results reveal a systematic exploitation of secondary deposits in nearby fluvial terraces, within a predominantly local procurement framework, occasionally complemented by supra-regional acquisition episodes.

View Article and Find Full Text PDF