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Researchers Generate a Directional, Spin-Polarized Photocurrent Using Topological Insulator

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MINNEAPOLIS/ST. PAUL, Minn., Dec. 21, 2017 — Researchers have developed a device for controlling the direction of photocurrent without using an electric voltage. This device, according to researchers, could provide a way of implementing coupled spin-orbit interaction between electrons and photons and could lead to applications in opto-spintronics and quantum information processing. The optoelectronic device integrates a topological insulator (TI) with a photonic waveguide. Interaction between photons in the waveguide and surface electrons in a Bi2Se3 (TI) layer generates a directional, spin-polarized photocurrent. Because of...Read full article

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