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Nonlinear phonon dynamics in Bi2Se3 driven by intense THz pulses and probed with optical second harmonic generation

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Abstract

We demonstrate a powerful, table-top approach for directly visualizing crystal lattice dynamics using optical second harmonic generation after intense terahertz photoexcitation of a specific phonon mode in the topological insulator Bi2Se3.

© 2016 Optical Society of America

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