Title :
Generating in-Plane Optical Orbital Angular Momentum Beams With Silicon Waveguides
Author :
Dengke Zhang ; Xue Feng ; Kaiyu Cui ; Fang Liu ; Yidong Huang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
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.
Keywords :
angular momentum; integrated optics; optical couplers; optical waveguides; silicon; CMOS technology; OAM modes; Si; couplers; in-plane optical orbital angular momentum beam generation; mode conversion; mode purity; optical communications; optical spanners; optical tweezers; silicon waveguides; Couplers; Optical beams; Optical device fabrication; Optical fibers; Silicon; Optical orbital angular momentum (OAM); integrated optical devices;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2256888