RESONANT-TUNNELING TIMES IN SUPERLATTICE STRUCTURES

We present a rigorous and convenient approach for estimating the reson ant states from the pole of the scattering matrix (reflection coeffici ent) in the complex energy plane and for determining the resonant tunn eling time from the spacing of the energy doublets arising at resonanc e. The numerical calculation is much faster than numerical integration of the Schrodinger equation. When we apply this method to the couplin g of two identical quantum wells, it is shown that the usual and naive estimation of resonant tunneling time through the Wentzel-Kramers-Bri llouin method is invalid. (C) 1996 American Institute of Physics.