Title :
Transmission-Efficient Structures of Bent and Crossing Silicon Slot Waveguides
Author :
Ishizaka, Yuhei ; Saitoh, Kunimasa ; Koshiba, Masanori
Author_Institution :
Grad. Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo, Japan
Abstract :
We present transmission-efficient bent and crossing silicon slot waveguides for compact silicon slot waveguide-based circuits. To begin with, using the 3-D vector finite-element method, we investigate the transmission characteristics of a bent silicon slot waveguide with an asymmetric slot that is connected to straight waveguides. Numerical results show that the transmission efficiency can be improved by optimizing a taper structure that is introduced between the bend of an asymmetric slot waveguide and its straight input/output waveguides. Next, we investigate the transmission characteristics of a 3-D crossing silicon slot waveguide that has a vertical coupler. Numerical results show that our crossing structure can achieve a high transmission efficiency compared with conventional structures.
Keywords :
elemental semiconductors; finite element analysis; light transmission; optical couplers; optical waveguides; silicon; 3D crossing silicon slot waveguide; 3D vector finite-element method; Si; asymmetric slot waveguide; bent silicon slot waveguides; compact silicon slot waveguide-based circuits; numerical analysis; optimization; straight input-output waveguides; taper structure; transmission characteristics; transmission-efficient structures; vertical coupler; Couplings; Geometry; Optical waveguides; Propagation losses; Refractive index; Silicon; Slot waveguides; finite-element methods; optical interconnects;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2281975
