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

Type
Article
Authors
Rinaldi, Christian
Cantoni, Matteo
Petti, Daniela
Sottocorno, Andrea
Leone, Marco
Caffrey, Nuala M.
Sanvito, Stefano
Bertacco, Riccardo
Date
2012-05-02

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Abstract
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.
Citation
Rinaldi C, Cantoni M, Petti D, Sottocorno A, Leone M, et al. (2012) Ge-Based Spin-Photodiodes for Room-Temperature Integrated Detection of Photon Helicity. Advanced Materials 24: 3037–3041. Available: http://dx.doi.org/10.1002/adma.201104256.
Sponsors
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).
Publisher
Wiley-Blackwell
Journal
Advanced Materials
ISSN
0935-9648
DOI
10.1002/adma.201104256
PubMed ID
22549940
Handle URI
http://hdl.handle.net/10754/598399
Collections
Publications Acknowledging KAUST Support