ArticleNature communications2023
Revealing low-loss dielectric near-field modes of hexagonal boron nitride by photoemission electron microscopy.
Article in Nature communications, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Coexistence of Metal and Dielectric Resonance Modes in a Single Nanostructure of a Hyperbolic Material.ACS nano · 2026Article
- Hyperbolic localized plasmons and twist-induced chirality in an anisotropic 2D material.Nature communications · 2026Article
- Seeing without touching: weak-disturbance imaging and characterization of ultra-confined optical near fields.Light, science & applications · 2026Article
- Weak-disturbance imaging and characterization of ultra-confined optical near fields.Light, science & applications · 2025Article
- Guiding light with surface exciton-polaritons in atomically thin superlattices.Nanophotonics (Berlin, Germany) · 2024Article
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Authors and funding
13 authors.
Funding
Abstract
Low-loss dielectric modes are important features and functional bases of fundamental optical components in on-chip optical devices. However, dielectric near-field modes are challenging to reveal with high spatiotemporal resolution and fast direct imaging. Herein, we present a method to address this issue by applying time-resolved photoemission electron microscopy to a low-dimensional wide-bandgap semiconductor, hexagonal boron nitride (hBN). Taking a low-loss dielectric planar waveguide as a fundamental structure, static vector near-field vortices with different topological charges and the spatiotemporal evolution of waveguide modes are directly revealed. With the lowest-order vortex structure, strong nanofocusing in real space is realized, while near-vertical photoemission in momentum space and narrow spread in energy space are simultaneously observed due to the atomically flat surface of hBN and the small photoemission horizon set by the limited photon energies. Our approach provides a strategy for the realization of flat photoemission emitters.
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