Topological slow-light in one-dimensional conjugated photonic systems
Journal
Optics Communications
Journal Volume
558
Date Issued
2024-05-01
Author(s)
Abstract
Topological slow-light in a one-dimensional conjugated topological photonic crystal (CTPhC) is presented. The study shows that extremely slow-light of 26.57 m/s group velocity and 7.52 × 10−7 s group delay are achieved in the proposed CTPhC with 20 μm thick, which is better than traditional approaches of slow-light. Results also show that there are two significant sensitive parameters for slow-light in the CTPhC. Robust and ultra-slow-light is achieved as the refractive index contrast of materials and the number of layers increases. It is worth noting that the CTPhC has a symmetric and wide operating range photonic bandgap, which has better slow-light effects than typical topological photonic crystal. It is expected that the CTPhC can provide an efficient approach to constructing robust and ultra-slow-light devices.
Subjects
Group delay | Group velocity | Photonic crystals | Slow-light | Superlattices
Type
journal article