Attosecond photoinjection dynamics in germanium

N. Di Palo; G. Inzani; L. Adamska; A. Eskandari-asl; G. L. Dolso; B. Moio; L. J. D'Onofrio; A. Lamperti; A. Molle; R. Borrego-Varillas; M. Nisoli; S. Pittalis; C. A. Rozzi; A. Avella; M. Lucchini

doi:10.1117/12.3022469

11 June 2024 Attosecond photoinjection dynamics in germanium

N. Di Palo, G. Inzani, L. Adamska, A. Eskandari-asl, G. L. Dolso, B. Moio, L. J. D'Onofrio, A. Lamperti, A. Molle, R. Borrego-Varillas, M. Nisoli, S. Pittalis, C. A. Rozzi, A. Avella, M. Lucchini

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Proceedings Volume PC12992, Advances in Ultrafast Condensed Phase Physics IV; PC129920O (2024) https://doi.org/10.1117/12.3022469
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

We investigate the ultrafast photoinjection process initiated by a few-femtosecond optical pulse in monocrystalline undoped germanium with attosecond transient reflectivity spectroscopy. By comparison with theoretical calculations, we decouple several distinct but concurring physical phenomena that are found to exhibit different timing within the pump envelope. As a result of their complex interplay, we found that intra-band motion hinders charge injection, in contrast with what has previously been observed in other semiconductors.

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N. Di Palo, G. Inzani, L. Adamska, A. Eskandari-asl, G. L. Dolso, B. Moio, L. J. D'Onofrio, A. Lamperti, A. Molle, R. Borrego-Varillas, M. Nisoli, S. Pittalis, C. A. Rozzi, A. Avella, and M. Lucchini "Attosecond photoinjection dynamics in germanium", Proc. SPIE PC12992, Advances in Ultrafast Condensed Phase Physics IV, PC129920O (11 June 2024); https://doi.org/10.1117/12.3022469

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