Nano Science and Technology Institute
Nanotech 2011 Vol. 2
Nanotech 2011 Vol. 2
Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Chapter 9: Nano & Micro: Computational Methods, Simulation & Software Tools

Performance Study of Nitride-Based Gunn Diodes

Authors:G. Aloise, S. Vitanov, V. Palankovski
Affilation:Advanced Material and Device Analysis Group, AT
Pages:599 - 602
Keywords:simulation, Gunn, nitride, diode
Abstract:In this work, we assess the performance of InN Gunn diodes, as a superior alternative to GaN. We perform two-dimensional mixed-mode device/circuit simulation accounting for self-heating effects. We verify available theoretical results for GaN-based Gunn diodes. We use a proprietary hydrodynamic high-field mobility model, calibrated against Monte Carlo simulation data, which properly accounts for the NDM effects. Thus, a fundamental oscillation frequency of 70 GHz and an output power of 39 dBm is reached for a 3 um device, which is in agreement with previous results for the same setup. We study an InN Gunn diode with an active layer of 3 um length, connected to a LCR-Cavity, which we optimized. As a result, we obtain a fundamental oscillation frequency of 150 GHz.The corresponding calculated output power is 8 dBm. Although the predicted output power for the InN Gunn diode is lower than that expected for GaN devices, the former demonstrates a superior fundamental frequency due to the higher electron velocity. Compared to known GaAs devices, InN Gunn diode of the same size delivers roughly the same power at the fourfold frequency.
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