Theory and Operation of a GaAs/AlGaAs/InGaAs Superlattice Phototransistor with Controlled Avalanche Gain

Albert Chin, Pallab Bhattacharya

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7 引文 斯高帕斯(Scopus)

摘要

The principle of operation of a bipolar transistor with controlled multiplication of one type of carriers is outlined. The ideal device, with a few periods of a staircase superlattice in the base-collector depletion region, has high current outputs at extremely low bias voltages and high current gains. The principle is experimentally demonstrated in a GaAs/AlGaAs/InGaAs phototransistor where three periods of a periodic pseudormorphic structure, in which electrons should predominantly multiply, are included in the collector depletion region. Independent measurements of the electron and hole avalanche multiplication rates, Mn and Mp, in these structures confirm that Mn/Mp and α/β are ~2-4, depending on bias voltage. The observed photocurrent characteristics agree reasonably well with Monte Carlo calculations made to simulate the transport of electrons through the collector region. Measured optical gains are as high as 142 in an n-p-n phototransistor with a 2000-Å p-base region.

原文English
頁(從 - 到)2183-2190
頁數8
期刊IEEE Transactions on Electron Devices
36
發行號10
DOIs
出版狀態Published - 1 一月 1989

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