Author Affiliations
Abstract
1 Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), Electrum 229, 164 40 Kista, Sweden
2 Center for Parallel Computers, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden
3 Department of Optical Engineering, Zhejiang University, Hangzhou 310027
Coupling between subwavelength-diameter silica wires and silicon-based waveguides is studied using the parallel three-dimensional (3D) finite-different time-domain method. Conventional butt-coupling to a silica-substrated silicon wire waveguide gives above 40% transmission at the wavelength range from 1300 to 1750 nm with good robustness against axial misalignments. Slow light can be generated by counter-directional coupling between a silica wire and a two-dimensional (2D) silicon photonic crystal slab waveguide. Through dispersion-band engineering, 82% transmission is achieved over a coupling distance of 50 lattice constants. The group velocity is estimated as 1/35 of the light speed in vacuum.
光子集成电路 微结构器件 二氧化硅线 硅波导 光子晶体 慢光 130.3120 Integrated optics devices 250.5300 Photonic integrated circuits 230.3990 Micro-optical devices Chinese Optics Letters
2007, 5(10): 577
