Open AccessFocusing of electromagnetic waves by periodic arrays of air holes with gradually varying radii
Author(s) -
Hung Ta Chien,
Chii Chang Chen
Publication year - 2006
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.14.010759
Subject(s) - optics , photonic crystal , gaussian beam , coupling (piping) , light beam , physics , beam (structure) , electromagnetic radiation , gaussian , materials science , quantum mechanics , metallurgy
We study theoretically the focusing effects when a Gaussian beam passing through a graded photonic crystal consisting of air holes with gradually varying radii. The device is used to couple the light between the conventional and photonic crystal waveguides. The coupling efficient is about 4 times higher than that by the linear taper structure.