Millimeter-Scale and Large-Angle Self-Collimation in a Photonic Crystal Composed of Silicon Nanorods

• Main Authors: Hao Li, Aimin Wu, Wei Li, Xulin Lin, Chao Qiu, Zhen Sheng, Xi Wang, Shichang Zou, Fuwan Gan
• Format: Article
• Language: English
• Published: IEEE 2013-01-01
• Series: IEEE Photonics Journal
• Subjects: Photonic crystal (PC); self-collimation (SC)
• Online Access: https://ieeexplore.ieee.org/document/6504461/
• ISSN: 1943-0655

We report the observation of a large-angle self-collimation phenomenon occurring in photonic crystals (PCs) composed of nanorods. Electromagnetic waves incident onto such PCs from directions covering a wide range of incident angles become highly localized along a single array of rods, which results in the narrow-beam propagation without divergence. A propagation length of 0.4 mm is experimentally observed over the wavelength ranging from 1540 nm to 1570 nm even in the large incident angle case, which is a very considerable length scale for on-chip optical interconnection.