Related Experiment Video
Updated: Jun 21, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Strong Coupling of Resonant Metasurfaces with Epsilon-Near-Zero Guided Modes
Peng Xie1,2, Yanhui Deng3, Qi Ding1,4
1College of Physics, Sichuan University, Chengdu 610065, China.
Abstract:
We study, both theoretically and experimentally, strong interaction between a quasi-bound state in the continuum (QBIC) supported by a resonant metasurface with an epsilon-near-zero (ENZ) guided mode excited in an ultrathin ITO layer. We observe and quantify the strong coupling regime of the QBIC-ENZ interaction in the hybrid metasurface manifested through the mode splitting over 200 meV. We also measure experimentally the resonant nonlinear response enhanced near the ENZ frequency and observe the effective nonlinear refractive index up to ∼4 × 10-13 m2/W in the ITO-integrated dielectric nanoresonators, which provides a promising platform for low-power nonlinear photonic devices.
Related Concept Videos
Standing Waves in a Cavity
Sound Waves: Resonance
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
Concept of Resonance and its Characteristics
Series Resonance

