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

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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

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank J. Gazquez and M. Varela for the transmission electron microscopy analysis, and G. Isella, P. Vavassori, H. Jaffres, and A. Fert for fruitful discussions. N.M.C. and S. S. thank Ivan Rungger for making available a version of Smeagol dealing with electrodes made of different materials, and for useful discussions. This work was partially supported by Science Foundation Ireland (Grant No. 07/IN.1/I945). The Smeagol code was supported by CRANN and by KAUST (ACRAB project).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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