Open AccessEnhancing the emission efficiency in photonic crystal waveguide with coupled waveguide arrays
Author(s) -
Qiong Wang,
Cui Yi-ping,
Huaming Li,
Lingling Zhang,
Jiayu Zhang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1020
Subject(s) - waveguide , photonic crystal , optics , finite difference time domain method , photonics , optoelectronics , interference (communication) , materials science , photonic integrated circuit , physics , telecommunications , channel (broadcasting) , computer science
We propose a system of enhanced emission efficiency by employing coupled waveguide arrays to a single-mode photonic crystal waveguide. The FDTD simulation results show that, when the coupled waveguide arrays are placed properly at the exit plane of the single-mode photonic crystal waveguide, the output light can be split into many light beams, and the interference of these light beams can produce a focusing emission beam, which greatly enhances the emission efficiency. In addition, when the row number of the waveguide arrays is larger than a certain value (2N=8), the state of the emission is nearly steady and the most compact structure can be obtained. This type of photonic crystal has potential applications in near-field optics or integrated optics.