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

Volume

5

Issue

5

fYear

2013

fDate

Oct. 2013

Firstpage

6601809

Lastpage

6601809

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;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2013.2281975

Filename

6600782