Generating in-Plane Optical Orbital Angular Momentum Beams With Silicon Waveguides

IEEE Photonics Journal

Xue Feng¹  Kaiyu Cui¹  Fang Liu¹  Yidong Huang¹  Dengke Zhang¹ 

[1] Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China;

关键词: Optical orbital angular momentum (OAM);    integrated optical devices;   

DOI  :  10.1109/JPHOT.2013.2256888

来源: DOAJ

【 摘 要 】

A simple on-chip integrated structure is proposed to generate optical orbital angular momentum (OAM) beams, where only silicon waveguides and couplers are involved. The operating principle is based on mode converting and proper controlling the phase shift of second-order propagating mode so that OAM modes with charge numbers of 1 or -1 can be selectively generated with mode purity > 90%. The proposed device is very compact with footprint of <; 120 μm × 50 μm and can be easily fabricated with CMOS technology. Thus, such OAM mode generator is a promising candidate for applications ranging from optical tweezers and optical spanners to optical communications.

【 授权许可】

Unknown