We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Visible to mid-infrared giant in-plane optical anisotropy in ternary van der Waals crystals.
- Authors
Feng, Yanze; Chen, Runkun; He, Junbo; Qi, Liujian; Zhang, Yanan; Sun, Tian; Zhu, Xudan; Liu, Weiming; Ma, Weiliang; Shen, Wanfu; Hu, Chunguang; Sun, Xiaojuan; Li, Dabing; Zhang, Rongjun; Li, Peining; Li, Shaojuan
- Abstract
Birefringence is at the heart of photonic applications. Layered van der Waals materials inherently support considerable out-of-plane birefringence. However, funnelling light into their small nanoscale area parallel to its out-of-plane optical axis remains challenging. Thus far, the lack of large in-plane birefringence has been a major roadblock hindering their applications. Here, we introduce the presence of broadband, low-loss, giant birefringence in a biaxial van der Waals materials Ta2NiS5, spanning an ultrawide-band from visible to mid-infrared wavelengths of 0.3–16 μm. The in-plane birefringence Δn ≈ 2 and 0.5 in the visible and mid-infrared ranges is one of the highest among van der Waals materials known to date. Meanwhile, the real-space propagating waveguide modes in Ta2NiS5 show strong in-plane anisotropy with a long propagation length (>20 μm) in the mid-infrared range. Our work may promote next-generation broadband and ultracompact integrated photonics based on van der Waals materials. van der Waals materials are usually characterized by a significant out-of-plane optical anisotropy, but in-plane birefringence is also necessary for photonics applications. Here, the authors report the presence of broadband optical anisotropy in a layered material, Ta2NiS5, showing in-plane birefringence of ~2 and ~0.5 in the visible and mid-infrared range, respectively.
- Subjects
ANISOTROPY; CRYSTALS; PHOTONICS; BIREFRINGENCE; WAVELENGTHS
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-42567-x