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Related Experiment Video

Updated: Dec 4, 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

Thouless pumping in disordered photonic systems.

Alexander Cerjan¹, Mohan Wang², Sheng Huang²

¹Department of Physics, The Pennsylvania State University, University Park, PA 16802 USA.

Light, Science & Applications

|October 22, 2020

Summary

This summary is machine-generated.

We demonstrated Thouless charge pumping in optical waveguides, showing it

Keywords:

Nanophotonics and plasmonics

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Last Updated: Dec 4, 2025

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Area of Science:

Topological physics
Quantum transport
Photonics

Background:

Thouless charge pumping enables topological transport in 1D systems.
Optical waveguides offer a platform for simulating quantum phenomena.

Purpose of the Study:

To experimentally demonstrate bulk Thouless pumping in disordered optical waveguide arrays.
To investigate the robustness of Thouless pumping against disorder and non-adiabaticity.

Main Methods:

Utilizing arrays of evanescently coupled optical waveguides.
Implementing Thouless charge pumping protocols.
Introducing controlled disorder into the waveguide system.

Main Results:

Bulk Thouless pumping was successfully demonstrated in the presence of disorder.
Pumping remained robust against deviations from adiabaticity and moderate disorder.
Near-full-unit-cell transport was achieved for localized excitations.

Conclusions:

Thouless pumping in disordered optical systems is feasible and robust.
This approach can inform the design of disorder-resistant slow-light devices.
Topological transport principles can be applied to photonic systems.