Tunable topological edge modes in Su-Schrieffer-Heeger arrays

Abstract

A potential weakness of topological waveguides is that they act on a fixed narrow band of frequencies. However, by 3D printing samples from a photo-responsive polymer, we can obtain a device whose operating frequency can be fine-tuned dynamically using laser excitation. This greatly enhances existing static tunability strategies, typically based on modifying the geometry. We use a version of the classical Su-Schrieffer-Heeger model to demonstrate our approach.

5 pages, 3 figures

References in corpus (11)

• Topological Insulators
• Topological Photonics
• Photonic Floquet Topological Insulators
• Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
• Topological Acoustics
• Direct Measurement of the Zak phase in Topological Bloch Bands
• Computing topological invariants without inversion symmetry
• Complex Edge-State Phase Transitions in 1D Topological Laser Arrays
• Surface Impedance and Bulk Band Geometric Phases in One-Dimensional Systems
• Tunable topological phononic crystals
• Topological rainbow trapping for elastic energy harvesting in graded SSH systems