Multiple Fano Resonances in Dynamic Resonant Tunneling Processes

The existence of Fano resonances in dynamic resonant tunneling (RT) systems has been investigated. are characterized by the appearance a 100% reflection coefficient proximity to high transmission coefficient. For resonance appear, bound state must exist. On other hand, process is and quasi-bound (QBS) instead one. It shown that, narrowing width barrier, energy QBS gradually decreases eventually turns into state. Consequently, RT process, there two scenarios: either exists, which case, exist for any barrier width, or should be narrow enough appear. In both cases, incoming particle’s frequency lower than oscillating well’s frequency. this work, these investigated detail, exactly numerically approximated analytical expressions derived weak strong amplitude regimes. One conclusions when low enough, multiple can appear varying barrier’s width. Since very sharp zero easily detected, property used as accurate method measuring even de-Broglie wavelength much larger