A locally one-dimensional finite difference time domain method for the analysis of a periodic structure at oblique incidence
Article first published online: 9 SEP 2011
Copyright 2011 by the American Geophysical Union.
Volume 46, Issue 5, October 2011
How to Cite
2011), A locally one-dimensional finite difference time domain method for the analysis of a periodic structure at oblique incidence, Radio Sci., 46, RS0F03, doi:10.1029/2011RS004730., , , and (
- Issue published online: 9 SEP 2011
- Article first published online: 9 SEP 2011
- Manuscript Accepted: 7 JUN 2011
- Manuscript Revised: 25 MAY 2011
- Manuscript Received: 31 MAR 2011
- finite difference time domain;
- locally one-dimensional;
- oblique incidence;
- periodic boundary condition
 An implicit finite difference time domain (FDTD) method is developed to analyze periodic structures at oblique incidence. The split-field technique is applied to the locally one-dimensional (LOD) FDTD method with the periodic boundary condition. In addition, the dispersion control parameters are introduced to reduce the numerical dispersion error. The effectiveness of the present method is investigated through the analysis of a photonic band gap structure. It is shown that the computational time is reduced to ≅16% of that of the explicit FDTD method with acceptable results being maintained. As an application, a broadband mirror consisting of a subwavelength grating is analyzed and discussed.