Work

Bounded Frequency Lattices in Coupled Lithium Niobate Ring Cavities

Year: 2026

Type: article

Abstract: ABSTRACT Synthetic dimensions provide a powerful tool that uses comparatively simple structures to probe high‐dimensional topological physics, in which edge states emerging at lattice boundaries are of great importance. However, the demonstration of lattice boundaries in synthetic dimensions is relatively nascent. In this work, we realize an integrated coupled ring system in a thin‐film lithium niobate photonic platform that enables the simulation of one‐dimensional frequency crystal lattice with sharp boundaries, attaining suppression for two coupling terms with a single auxiliary cavity. Their effect on tight‐binding lattice dynamics was verified by acquiring discretized band structures of an site lattice. The ability to create robust frequency‐space boundaries is a key step toward the realization of topological systems that harness bulk‐edge correspondence as well as optical information processing in a photonic chip.

Source: Laser & Photonics Review

DOI: 10.1002/lpor.71745

Authors: Hiep Xuan Dinh, Armandas Balčytis, Guanghui Ren, Mei Xian Low, Arnan Mitchell, Thach G. Nguyen

Institutions: RMIT University, Center for Physical Sciences and Technology

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,880

Funders: Australian National Fabrication Facility, Australian Government, RMIT University, Australian Research Council