Title :
A novel directional coupler utilizing a left-handed material
Author :
Xiao, Sanshui ; Shen, Linfang ; He, Sailing
Author_Institution :
Centre for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou, China
Abstract :
A novel directional coupler with a left-handed material (LHM) layer between two single-mode (SM) waveguides of usual material is introduced. The coupling system is analyzed with the supermode theory. It is shown that such an LHM layer of finite length can shorten significantly the coupling length for the two SM waveguides. An LHM layer with two slowly tapered ends is used to avoid the reflection loss at the ends.
Keywords :
coupled mode analysis; optical directional couplers; optical planar waveguides; optical waveguide theory; refractive index; E-polarized modes; H-polarized modes; coupling length; directional coupler; effective index method; finite length layer; left-handed material layer; optical planar waveguide couplers; single-mode waveguides; slowly tapered ends; supermode theory; Directional couplers; Electromagnetic waveguides; Magnetic materials; Metamaterials; Optical interferometry; Optical materials; Optical refraction; Optical surface waves; Optical waveguides; Samarium;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818950
