Coherent phonons in Bi2Se3 induced by a powerful THz pulse
Institute of Spectroscopy RAS, 108840 Troitsk, Moscow, Russia
2 P.N. Lebedev Physics Institute RAS, 119991 Moscow, Russia
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Published online: 31 October 2017
Using the electro-optic detection method we have detected coherent phonons of Eg1, Eu1, Eg2, and A1g1 symmetry generated in a crystalline film of Bi2Se3 by a powerful single-cycle THz pulse. Coherent excitation of Raman active modes is interpreted as a result of three-and four-phonon interactions in the anharmonic crystal lattice of Bi2Se3.
© The Authors, published by EDP Sciences, 2017
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