中国物理B ›› 2017, Vol. 26 ›› Issue (11): 114210-114210.doi: 10.1088/1674-1056/26/11/114210
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Angular-modulated spatial distribution of ultrahigh-order modes assisted by random scattering
Xue-Fen Kan(阚雪芬), Cheng Yin(殷澄), Tian Xu(许田), Fan Chen(陈凡), Jian Li(李建), Qing-Bang Han(韩庆邦), Xian-Feng Chen(陈险峰)
- 1. Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Hohai University, Changzhou 213022, China;
2. The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Department of Physics and Astronomy, Shanghai JiaoTong University, Shanghai 200240, China;
3. Physics Department, Nantong University, Nantong 226007, China;
4. Optoelectronics Devices Laboratory, Photonlabs Inc., Shanghai 201843, China
Angular-modulated spatial distribution of ultrahigh-order modes assisted by random scattering
Xue-Fen Kan(阚雪芬)1, Cheng Yin(殷澄)1,2, Tian Xu(许田)3, Fan Chen(陈凡)4, Jian Li(李建)1, Qing-Bang Han(韩庆邦)1, Xian-Feng Chen(陈险峰)2
- 1. Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Hohai University, Changzhou 213022, China;
2. The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Department of Physics and Astronomy, Shanghai JiaoTong University, Shanghai 200240, China;
3. Physics Department, Nantong University, Nantong 226007, China;
4. Optoelectronics Devices Laboratory, Photonlabs Inc., Shanghai 201843, China
摘要： In designing an optical waveguide with metallic films on a nanometer scale, the random scattering by the natural roughness of the thin film is always ignored. In this paper, we demonstrate that for the ultrahigh-order modes (UOMs) in the symmetric metal cladding waveguide, such a scattering leads to drastic variations in their spatial distribution at different incident angles. Owing to the high mode density of the UOMs, the random scattering induced coupling can be easily related to different modes with different propagation directions or wavenumbers. At small incident angles, the intra-mode coupling dominates, which results in a spatial distribution in the form of concentric rings. At large incident angles, the inter-mode coupling plays the most important role and leads to an array-like pattern. Experimental evidence via optically trapped nanoparticles support the theoretical hypothesis.
中图分类号: (Optical waveguides and couplers)
- 42.79.Gn