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Updated: Jan 14, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Long-range optical coupling with epsilon-near-zero materials.

Danqing Wang^1,2,3,4, Zheyu Lu^5,6,7, Sorren Warkander⁸

¹College of Future Information Technology, Shanghai Engineering Research Centre of Ultra-precision Optical Manufacturing, Fudan University, Shanghai, China. danqingwang@fudan.edu.cn.

Nature Communications

|October 16, 2025

Summary

This summary is machine-generated.

Researchers demonstrate long-range optical interactions using epsilon-near-zero materials, analogous to quantum tunneling. Intense electromagnetic fields show anti-correlated oscillations in thin films, enabling new photonic applications.

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Last Updated: Jan 14, 2026

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Area of Science:

Photonics
Quantum Optics
Materials Science

Background:

Quantum tunneling enables electron transport via wavefunction interference.
Evancescent coupling typically limits optical interactions in thin films.

Purpose of the Study:

To demonstrate an optical analogy to long-range resonant quantum tunneling.
To explore phase-modulated optical interactions beyond evanescent coupling.
To investigate applications in optical communication and photonic circuits.

Main Methods:

Utilizing epsilon-near-zero (ENZ) materials for optical interactions.
Confining intense electromagnetic fields within ENZ thin films.
Probing field intensities using second harmonic generation in indium tin oxide multilayers.

Main Results:

Achieved long-range optical interactions between oxide layers up to hundreds of microns.
Observed anti-correlated intensity oscillations of confined electromagnetic fields.
Demonstrated subwavelength mode footprint with long-range radiative coupling.

Conclusions:

ENZ materials enable novel long-range optical interactions analogous to quantum tunneling.
The observed phenomena offer potential for advanced optical communication and large-scale photonic systems.
This work paves the way for hybrid quantum photonic systems.