TY  - JOUR
SP  - 542
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
PB  - ELSEVIER GMBH, URBAN & FISCHER VERLAG
TI  - Quadratic recursive convolution (QRC) in dispersive media simulation of finite-difference time-domain (FDTD)
SN  - 0030-4026
Y1  - 2017/06//
A1  - Ji, J
A1  - Tong, K-F
A1  - Xue, H
A1  - Huang, P
VL  - 138
UR  - https://doi.org/10.1016/j.ijleo.2017.03.084
AV  - public
N2  - This paper presents a novel formulation for dispersive media computation in finite-difference time-domain (FDTD). Motivated by conventional recursive convolution (RC) methods in handling convolution integral, the method name quadratic RC (QRC) makes improvement in the approximation of electric field in convolution integral. The electric field is approximated by quadratic function determined by the fields at three time steps at current, next and former. Via quadratic interpolation, the convolution integral result is approximated by the linear combination of three electric fields, rather than two fields in trapezoidal RC (TRC) or piecewise linear RC (PLRC) and one field in constant RC (CRC). Because three electric fields are required for the convolution integral, the method needs two more back level storage of the electric fields to fulfill the recursion process. Numerical demonstrations of Debye and Drude slab's transmission and reflection coefficients demonstrate the efficiency and accuracy of the novel method.
JF  - Optik
EP  - 549
ID  - discovery10073877
ER  -