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Updated: Dec 13, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

Photonic amorphous topological insulator.

Peiheng Zhou¹, Gui-Geng Liu², Xin Ren¹

¹National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, 610054 Chengdu, China.

Light, Science & Applications

|July 31, 2020

Summary

This summary is machine-generated.

Researchers explored amorphous photonic topological insulators, finding that topological edge states persist in disordered lattices before a glass-to-liquid transition. These states vanish after the transition, opening avenues for novel non-crystalline topological materials.

Keywords:

Photonic crystals Quantum optics

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Area of Science:

Condensed matter physics
Photonics
Materials science

Background:

Topological insulators and photonic topological insulators are typically understood through topological band theory.
Standard band theory is insufficient for amorphous materials lacking long-range order.
Amorphous phases exhibit unique phenomena like the glass-to-liquid transition.

Purpose of the Study:

To experimentally investigate amorphous variants of Chern number-based photonic topological insulators.
To understand the behavior of topological edge states in non-crystalline lattices.
To explore the relationship between topology, disorder, and amorphous phase transitions.

Main Methods:

Fabrication of amorphous photonic lattices with tunable disorder.
Experimental characterization of photonic topological edge states.
Analysis of lattice structure and order before and after the glass-to-liquid transition.

Main Results:

Photonic topological edge states were observed to persist in the amorphous regime before the glass-to-liquid transition.
The strength of disorder was tuned to control the persistence of these states.
Topological edge state signatures disappeared after the lattice transitioned to a liquid-like configuration.

Conclusions:

Topological edge states can exist in amorphous photonic systems with short-range order.
The glass-to-liquid transition disrupts topological properties in these systems.
This research enables the development of new non-crystalline topological photonic bandgap materials.