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- W4385260993 abstract "We study the optical generation and control of coherent phonons in elemental bismuth (Bi) and antimony (Sb) using a classical equation of motion informed by first-principles calculations of the potential energy surface and the frequency-dependent macroscopic dielectric function along the zone-centered optical phonons coordinates. Using this approach, we demonstrate that phonons with the largest optomechanical couplings, also have the strongest degree of anharmonicity, a result of the broken symmetry structural ground state of Bi and Sb. We show how this anharmonicity, explaining the light-induced phonon softening observed in experiments, prevents the application of standard phonon-amplification and annihilation protocols. We introduce a simple linearization protocol that extends the use of such protocols to the case of anharmonic phonons in broken symmetry materials, and demonstrate its efficiency at high displacement amplitudes. Our formalism and results provide a path for improving optical control in non-linear phononics." @default.
- W4385260993 created "2023-07-26" @default.
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- W4385260993 date "2023-07-21" @default.
- W4385260993 modified "2023-09-23" @default.
- W4385260993 title "Illumination protocols for non-linear phononics in bismuth and antimony" @default.
- W4385260993 doi "https://doi.org/10.48550/arxiv.2307.11854" @default.
- W4385260993 hasPublicationYear "2023" @default.
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