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Christian Rinaldi, Matteo Cantoni, Daniela Petti, Andrea Sottocorno, Marco Leone, Nuala M. Caffrey, Stefano Sanvito and Riccardo Bertacco Ge-Based Spin-Photodiodes for Room-Temperature Integrated Detection of Photon Helicity Advanced Materials 24

Version of Record online: 2 MAY 2012 | DOI: 10.1002/adma.201104256

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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 I0 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.

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