Open AccessBeam splitting at the output of photonic crystal waveguides with discrete surface point defects
Author(s) -
Qi Wang,
Lanlan Zhang,
Qi Li
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.024245
Subject(s) - beam splitter , photonic crystal , finite difference time domain method , optics , beam (structure) , photonic integrated circuit , surface (topology) , materials science , waveguide , point (geometry) , photonics , light beam , crystallographic defect , electronic circuit , optoelectronics , physics , laser , mathematics , geometry , quantum mechanics , condensed matter physics
With the method of adding two point defects on modulated surface, novel photonic crystal (PC) waveguide-based beam splitters were presented. The modulated surface layer supports surface states, and introduced discrete point defects can serve as discrete light emitters. The finite-difference time-domain (FDTD) simulations show that the number of beams is sensitive to the distance of two point defects. By adjusting the positions of the point defects, 1-to-N beam splitters can be realized. These simple, easy-to-fabricate and controllable structures have important potential applications in integrated optical circuits.