2011/05/14 by Christian Rinaldi, C. Rinaldi, Rinaldi, C. +16
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Materials Science (cond-mat.mtrl-sci) #Quantum and electron transport phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1105.2908
This paper has been withdrawn by the author due to some imperfections in the figures
openalex publication_date 2011/05/14 · arxiv created 2011/10/24 · arxiv updated 2011/10/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Here we show the room temperature integrated detection of the helicity of photons with 1300 nm wavelength, via spin- photodiodes based on fully epitaxial Fe/MgO/Ge(001) heterostructures. These devices convert the photon helicity in a variation of the photocurrent (ΔI) for opposite orientations of the Fe magnetization. We found ΔI on the order of 5.9% for 100% circularly polarized light, both in the forward and the reverse bias, with a contribution of 0.8% from the Fe dichroic light absorption and of 5.1% from the spin filtering of photo-generated carriers crossing the Fe/MgO/Ge tunneling barrier.