Hybrid perovskite integrated electro-optic modulator

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Modulators are core devices in silicon photonics chips, converting electrical signals to optical signals. Current technologies are based on silicon pn junctions. However, these devices fail to provide a combination of low cost, small footprint and low driving voltages. Other modulator technologies exist that have the potential to provide a combination of optimal performance and low cost, but the materials are incompatible with silicon photonics device architectures. Organics suffer from limited stability.Hybrid perovskites are a new class of materials that find applications in efficient light emission and photovoltaics. These solution-processed materials can be engineered on the nano-scale to optimize the optoelectronic properties. In this project, we will use hybrid perovskites to stabilize organic molecules in order to create efficient electro-optic materials. We will design optimal electro-optic molecules, synthesize them and incorporate them in the layered structure of the perovskites. We will characterize single crystals of the perovskites for their electro-optic properties. Optimization of the materials and growth processes will lead to the demonstration of electro-optic materials that combine large responses with low power consumption and stability. We will design silicon photonics chips in which the modulator footprint is reduced, permitted by the performance of the hybrid perovskite materials. We will demonstrate that the on-chip hybrid perovskites provide the means for low power operation. The proposed research and development will culminate in the demonstration of low-power silicon photonics chips for optical communications.