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Optical spin pumping in silicon
Stefano Achilli, Damiano Marian, Mario Lodari, Emiliano Bonera, Giordano Scappucci, Jacopo Pedrini, Michele Virgilio, Fabio Pezzoli
https://arxiv.org/abs/2506.09926

Optical spin pumping in silicon
The generation of an out-of-equilibrium population of spin-polarized carriers is a keystone process for quantum technologies and spintronics alike. It can be achieved through the so-called optical spin orientation by exciting the material with circularly polarized light. Although this is an established technique for studying direct band-gap semiconductors, it has been proven limited in materials like Si that possess weak oscillator strengths for the optical transitions. In this study, we addres…