Research Paper#Photonics, Topological Insulators, Phase-Change Materials🔬 ResearchAnalyzed: Jan 3, 2026 18:40
Low-Loss Switchable Topological Photonic Crystal
Published:Dec 29, 2025 15:57
•1 min read
•ArXiv
Analysis
This paper presents a significant advancement in reconfigurable photonic topological insulators (PTIs). The key innovation is the use of antimony triselenide (Sb2Se3), a low-loss phase-change material (PCM), integrated into a silicon-based 2D PTI. This overcomes the absorption limitations of previous GST-based devices, enabling high Q-factors and paving the way for practical, low-loss, tunable topological photonic devices. The submicron-scale patterning of Sb2Se3 is also a notable achievement.
Key Takeaways
- •Introduces a low-loss, switchable photonic topological insulator.
- •Utilizes Sb2Se3, a low-loss phase-change material, to overcome absorption limitations.
- •Achieves submicron-scale patterning of Sb2Se3.
- •Demonstrates a high Q-factor, significantly improving upon previous devices.
- •Paves the way for practical, tunable topological photonic devices.
Reference
““Owing to the transparency of Sb2Se3 in both its amorphous and crystalline states, a high Q-factor on the order of 10^3 is preserved-representing nearly an order-of-magnitude improvement over previous GST-based devices.””