High-speed modulators and photodetectors based on Ge/SiGe Quantum Wells

Delphine Marris-Morini (1) , Vladyslav Vakarin (1) , Papichaya Chaisakul (1) , Jacopo Frigerio (2) , Mumtahina Rahman (1) , Joan-Manel Ramírez (1) , Andrea Ballabio (2) , Daniel Chrastina (2) , Xavier Le Roux (1) , Laurent Vivien (1) , Giovanni Isella (2)

1 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
2 POLIMI - Politecnico di Milano [Milan]

Recent advances in the theoretical and experimental studies of Ge/SiGe quantum wells structures will be presented with a focus on optical telecommunication applications. Firstly, high-speed stand-alone Ge/SiGe QW electro-absorption modulators and photodetectors will be reported. It will be followed by the presentation of different methods for engineering Ge/SiGe QW to tune the operating wavelength to 1.3 µm. Then the demonstration of a strong electro-refraction Ge/SiGe QW will be reported. This effect could be used to achieve optical modulation but requires the embedding of the QWs in a Mach-Zehnder interferometer. Finally it will be shown that these active devices can be combined with advanced passive structures using Ge-rich SiGe virtual substrate on graded buffer as a waveguide.

Domaines: Optique / photonique

Delphine Marris-Morini, Vladyslav Vakarin, Papichaya Chaisakul, Jacopo Frigerio, Mumtahina Rahman, et al.. High-speed modulators and photodetectors based on Ge/SiGe Quantum Wells. E-MRS Fall Meeting and Exhibit, Sep 2016, Varsovie, Poland. ⟨hal-01388117⟩