Abstract

Band gap narrowing in heavily doped p-type GaAs is estimated by photoluminescence measurement. Measured values agree well with the theoretical results. Monte Carlo simulation of minority electron transport demonstrates that plasmon scattering plays an essential role in heavily doped p-type GaAs. Theoretical calculations, including these heavy doping effects, on heterojunction bipolar transistors (HBT's) show that maximum oscillatiorn frequency of over 300 GHz is expected by increasing the hole concentration of the base layer to 1×1021 cm-3.

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