Lifetime of the Stark resonant level in double-barrier structures

We present an exact numerical calculation for the energy level and the Stark resonance width of the lowest quasibound state in the double-barrier structure with an applied electric field by solving the Schr\"odinger equation directly. Our results clearly demonstrate the effect of the applied electric field on both the energy level and the resonance width, which has so far been ignored. Our results predict a rapid decrease of the resonant-level lifetime with increasing electric field. The dependence of our results on the barrier width is also discussed.