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- W1867336077 abstract "Electronic bands in crystals can support nontrivial topological textures arising from spin-orbit interactions, but purely orbital mechanisms can realize closely related dynamics without breaking spin degeneracies, opening up applications in materials containing only light elements. One such application is the circular photogalvanic effect (CPGE), which is the generation of photocurrents whose magnitude and polarity depend on the chirality of optical excitation. We show that the CPGE can arise from interband transitions at the metal contacts to silicon nanowires, where inversion symmetry is locally broken by an electric field. Bias voltage that modulates this field further controls the sign and magnitude of the CPGE. The generation of chirality-dependent photocurrents in silicon with a purely orbital-based mechanism will enable new functionalities in silicon that can be integrated with conventional electronics." @default.
- W1867336077 created "2016-06-24" @default.
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- W1867336077 date "2015-08-14" @default.
- W1867336077 modified "2023-10-17" @default.
- W1867336077 title "Voltage-tunable circular photogalvanic effect in silicon nanowires" @default.
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- W1867336077 doi "https://doi.org/10.1126/science.aac6275" @default.
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