Title :
Characteristics of Evanescent Waves in the Nonstandard FDTD Method
Author :
Taguchi, Kenji ; Ohtani, Tadao ; Kashiwa, Tatsuya ; Kanai, Yasushi
Author_Institution :
Kumamoto Nat. Coll. of Technol., Koshi
fDate :
4/1/2007 12:00:00 AM
Abstract :
This paper investigates the characteristics of evanescent waves in the generalized nonstandard finite-difference time-domain (NS-FDTD) method and derives the dispersion equation and stability condition for two-dimensional space. The validity of the dispersion equation is confirmed by comparison with results of numerical simulations. The NS-FDTD method is applied to the analysis of an optical switching device using a photon tunneling effect. It is shown that the NS-FDTD method has highly accurate characteristics not only for propagating waves, but also for evanescent waves compared with the standard FDTD method
Keywords :
finite difference time-domain analysis; optical dispersion; optical switches; stability; wave propagation; FDTD method; dispersion equation; evanescent waves; finite-difference time-domain method; numerical simulations; optical switching device; stability condition; two-dimensional space; wave propagation; Equations; Finite difference methods; Frequency; Optical devices; Optical propagation; Optical surface waves; Space technology; Stability; Time domain analysis; Tunneling; Evanescent wave; finite-difference time-domain (FDTD) methods; nonstandard finite-difference time-domain (NS-FDTD) methods; numerical dispersion; photon tunneling effect; stability condition;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.891002
