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Updated: Jun 5, 2025

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Published on: March 19, 2016

Optical mode-controlled topological edge state in waveguide lattice.

Changyu Zhou¹, Zhenwei Xie¹, Ting Lei¹

¹Nanophotonics Research Center, Institute of Microscale Optoelectronics & State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

Researchers developed a controllable topological edge state (TES) in photonic systems using a Su-Schrieffer-Heeger (SSH) waveguide lattice. This innovation enables precise light manipulation for robust optical devices without altering the topological phase.

Keywords:

SSH model topological edge state topological mode splitter waveguide lattice

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Area of Science:

Photonics
Topological Physics
Condensed Matter Physics

Background:

Topological edge states (TES) offer unidirectional light transmission, enhancing robustness in photonic systems for applications like optical isolation and topological lasers.
Current research often lacks control over generated TES, limiting their manipulation and application potential.
Existing methods for generating TES are typically fixed, hindering dynamic control and advanced functionalities.

Purpose of the Study:

To propose and demonstrate a novel scheme for controllable topological edge states (TES) in photonic systems.
To enable manipulation of TES without altering the system's topological phase.
To realize an effective mode splitter based on controlled TES.

Main Methods:

Implementation of a topological Su-Schrieffer-Heeger (SSH) waveguide lattice.
Selective light localization at the edges of the SSH waveguide lattice, governed by specific waveguide modes.
Fabrication and experimental validation of an on-chip device.

Main Results:

Demonstration of controllable TES in an SSH waveguide lattice.
Successful separation of waveguide modes, functioning as an effective mode splitter.
Experimental validation with a mode extinction ratio of approximately 10 dB at 1550 nm.

Conclusions:

The proposed SSH waveguide lattice scheme enables controllable TES without topological phase changes.
This method provides a promising approach for manipulating TES in photonic systems.
The findings facilitate the design of controllable topological photonic devices and optical mode splitters.