Author:
Crisci Teresa,Maccagnani Piera,Moretti Luigi,Summonte Caterina,Gioffrè Mariano,Rizzoli Rita,Medugno Mario,Iodice Mario,Coppola Giuseppe,Casalino Maurizio
Abstract
In last years, the introduction of 2-dimensional materials such as graphene has revolutionized the world of silicon photonics. In this work, we demonstrate a new approach for integrating graphene into silicon-based photodetectors. We leverage a thin film of hydrogenated amorphous silicon to embed the graphene within two different photonic structures, an optical Fabry-Pérot microcavity, and a waveguide, achieving a stronger light-matter interaction. The investigated devices have shown promising performance resulting in responsivities as high as 27 mA/W and 0.15 A/W around 1550 nm, respectively.
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