Topologically protected frequency control of broadband signals in dynamically modulated waveguide arrays

Abstract

We theoretically propose a synthetic frequency dimension scheme to control the spectrum of a light beam propagating through an array of evanescently coupled waveguides modulated in time by a propagating sound wave via the acousto-optical effect. Configurations are identified where the emerging two-dimensional synthetic space-frequency lattice displays a non-trivial topological band structure. The corresponding chiral edge states can be exploited to manipulate the frequency spectrum of an incident beam in a robust way. In contrast to previous works, our proposal is not based on discrete high-Q cavity modes, which paves the way to the manipulation of broadband signals.

23 pages, 6 figures

References in corpus (6)

• Photonic Topological Anderson Insulators
• Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies
• Spectral photonic lattices with complex long-range coupling
• Tutorial: synthetic frequency dimensions in dynamically modulated ring resonators
• Erasing Distinguishability Using Quantum Frequency Up-Conversion
• Topological phases in ring resonators: recent progress and future prospects

Cited by in corpus (6)

• A comprehensive review on developments of synthetic dimensions
• All-optical control of the photonic Hall lattice in a pumped waveguide array
• Artificial gauge fields in the t-z mapping for optical pulses: spatio-temporal wavepacket control and quantum Hall physics
• Topology in a one-dimensional plasmonic crystal
• Tailoring quantum walks in integrated photonic lattices
• Synthetic-lattice Bloch wave dynamics in a single-mode microwave resonator