SPICE Modeling of GaN MicroLEDs for Optical Communication

Abstract

With the rapid expansion of data centers, there is a growing demand for high data-rate, energy-efficient optical links over short distances. One potential technology for this application is Gallium-Nitride (GaN) based microlight emitting diodes (μLEDs), thanks to their compact size, high-speed operation, and ease of manufacturability. During the development of these μLEDs, modeling plays an essential role in optimizing their performance. In this paper, we present various models to estimate both the static and dynamic performance of GaN μLEDs of various sizes. We then propose a methodology to integrate these models into a unified equivalent circuit model, enabling the simulation of the full response of the μLED. Finally, we implement this unified model in a circuit-simulation-compatible module and replicate the experimental setups within a simulation software to evaluate the module's ability to accurately simulate the μLED's response.