Related Experiment Video
Updated: Jan 7, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Observation of Edge-Confined Acoustic Hyperbolic Polaritons in van der Waals Materials
Tianning Zhang1,2,3,4, Xiaojie Jiang1,2,3, Xiaosheng Yang1,2,3
1Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China.
Abstract:
Hyperbolic polaritons (HPs) supported by van der Waals (vdW) materials enable exceptionally strong light-matter interactions through deep subwavelength confinement. This confinement can be further enhanced when a polaritonic mode couples to its mirror image in a metallic substrate, giving rise to acoustic hyperbolic polaritons (AHPs). While most previous studies have focused on volume-confined AHPs (v-AHPs), edge-confined AHPs (e-AHPs) remain experimentally elusive. Here, we provide the first near-field observation of e-AHPs by launching and imaging them in the prototypical sample of hexagonal boron nitride (hBN) on a gold substrate. Unlike v-AHPs propagating inside hBN, these e-AHPs are guided along the hBN edges and exhibit shorter polariton wavelengths, as revealed by both near-field imaging and extracted dispersion relations. Enhanced vibrational strong coupling in e-AHPs, experimentally verified by monitoring molecular-induced near-field responses, demonstrates their suitability for high-sensitivity molecule detection. These distinctive properties establish e-AHPs as a promising platform for optical sensing and on-chip nanophotonic devices.
More Related Videos
10:35Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
11:08Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Related Concept Videos
Standing Waves in a Cavity
Potential Due to a Polarized Object
Dielectric Polarization in a Capacitor
The de Broglie Wavelength