Modeling of Sb-heterostructure backward diode for millimeter- and submillimeter-wave detection

We present modeling of Sb-heterostructure backward tunneling diode (Sb-HBD) for high efficient millimeter- and submillimeter wave detection. The diode heterostructure is modeled and optimized using TCAD software implementing a non-local band-to-band tunneling model combining with the standard drift-diffusion model. The physical device model was found to be in good agreement with reported experimental results. InAsSb/AlSb/AlGaSb structures were proposed and simulated considering the material growth. The potential of the Sb-HBDs for high frequency operation applications is investigated.