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Theoretical Analysis of Peak to Valley Ratio in Current Density for Double-Barrier Structures with Outer-Wells
C - Abstracts of IEICE TRANSACTIONS on Electronics (Japanese Edition) Vol.J90-C No.2 pp.134-142
Publication Date: 2007/02/01
Online ISSN: 1881-0217
Print ISSN: 1345-2827
Type of Manuscript: PAPER
peak to valley ratio,
Full Text(in Japanese): PDF(427.8KB)
Analytical expressions for the tunneling transmission coefficient and the resonance condition are derived in the rectangular double-barrier structures with outer-wells. It is confirmed that the resonance condition depends mainly on the central well. We have calculated the current density for both the symmterical and the asymmetrical structures with pre-well, with outer-wells, or without outer-well. It is found that the value of peak to valley ratio in current density for symmetrical double-barrier structures with outer-wells is better than that with pre-well, and that outer-wells added to the asymmetrical structures improve moreover the value of peak to valley ratio.