Experimental demonstration of single-mode topological valley-Hall lasing at telecommunication wavelength controlled by the degree of asymmetry
Abstract
Topology plays a fundamental role in contemporary physics and enables new information processing schemes and wave device physics with built-in robustness. However, the creation of photonic topological phases usually requires complex geometries that limit the prospect for miniaturization and integration and dispossess designers of additional degrees of freedom needed to control topological modes on-chip. By controlling the degree of asymmetry (DoA) in a photonic crystal with broken inversion symmetry, we report single-mode lasing of valley-Hall ring cavities at telecommunication wavelength. The DoA governs four photon confinement regimes at the interface of topologically distinct valley-Hall domains and evidences an interplay between the width of the topological bandgap and the quality factor of ring-like modes for single-mode operation. Our results open the door to novel optoelectronic devices and systems based on compact topological integrated circuits.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 16, 2020
- Source ID
- 10.1364/ol.399053
Entities
People
- Boubacar Kanté
- Chi-Hsin Huang
- Hadiseh Nasari
- Hwi-min Kim
- Quynh Le-van
- Wanwoo Noh
- Zhetao Jia
Organizations
- Defense Advanced Research Projects Agency
- National Science Foundation
- Office of Naval Research