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Updated: Jun 4, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Published on: April 4, 2017

Coupling-Controlled Photonic Topological Ring Array.

Chang Chang^1,2,3, Yuhan Sun^1,2,3, Ting Li¹

¹School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China.

|December 23, 2024

Summary

This summary is machine-generated.

Researchers demonstrate a tunable photonic topological insulator using coupled resonator optical waveguides (CROWs). This robust system guides light along a controllable boundary, offering solutions for optical device imperfections.

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Area of Science:

Photonics
Condensed Matter Physics
Optical Engineering

Background:

Photonic topological insulators offer robust light propagation by utilizing boundary states, mitigating issues from structural imperfections.
Coupled resonator optical waveguides (CROWs) are effective platforms for realizing photonic topological insulators due to their distinct topological phases and band structures.

Purpose of the Study:

To design and experimentally validate a CROW array capable of dynamically altering its topological phase.
To demonstrate control over light propagation by manipulating the boundary between topological and trivial regions within the CROW array.

Main Methods:

Fabrication of a coupled resonator optical waveguide (CROW) array.
Experimental validation of tunable topological phase transitions by adjusting inter-resonator coupling strength.
Demonstration of light guiding along the engineered boundary between topological and trivial insulator regions.

Main Results:

The CROW array successfully exhibited tunable topological phases.
Light was guided along the boundary between the topological and trivial regions, demonstrating defect-immune propagation.
Control over the optical path was achieved by altering the shape of the topological insulator region.

Conclusions:

The developed CROW-based photonic topological insulator provides a robust method for controlling light propagation.
This tunable system shows potential for practical applications in optical switches, dynamic light steering, sensing, and computing.