Ge-Based Spin-Photodiodes for Room-Temperature Integrated Detection of Photon Helicity

Christian Rinaldi, Matteo Cantoni, Daniela Petti, Andrea Sottocorno, Marco Leone, Nuala M. Caffrey, Stefano Sanvito, Riccardo Bertacco

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


Spin-photodiodes based on Fe/MgO/Ge(001) heterostructures are reported. These devices perform the room-temperature integrated electrical detection of the spin polarization of a photocurrent generated by circularly polarized photons with a wavelength of 1300 nm, for light pulses with intensity I 0 down to 200 μW. A forward and reverse-biased average photocurrent variation of 5.9% is measured for the complete reversal of the incident light helicity. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)3037-3041
Number of pages5
JournalAdvanced Materials
Issue number22
StatePublished - May 2 2012
Externally publishedYes


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