All-optical control of coherent phonons in the candidate type-II Weyl semimetal WTe2

Sergio I. Rey P.; Martin J. Cross; Malte L. Welsch; Tobias O. Buchmann; Binbin Zhou; Peter U. Jepsen; Edmund J. R. Kelleher

doi:10.1117/12.2690825

5 October 2023 All-optical control of coherent phonons in the candidate type-II Weyl semimetal WTe₂

Sergio I. Rey P., Martin J. Cross, Malte L. Welsch, Tobias O. Buchmann, Binbin Zhou, Peter U. Jepsen, Edmund J. R. Kelleher

Author Affiliations +

Proceedings Volume 12681, Ultrafast Nonlinear Imaging and Spectroscopy XI; 126810A (2023) https://doi.org/10.1117/12.2690825
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Using ultrafast double-pulse spectroscopy, our experiment showcases coherent control over the 2.39 THz optical phonon mode within bulk WTe₂. Through precise manipulation of the delay between successive pump pulses, we successfully achieve modulation of the phonon amplitude at room temperature by a factor of two. This breakthrough showcases the potential for all-optical control and modulation of the unique properties in WTe₂ that are directly bound to its structural degrees of freedom.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sergio I. Rey P., Martin J. Cross, Malte L. Welsch, Tobias O. Buchmann, Binbin Zhou, Peter U. Jepsen, and Edmund J. R. Kelleher "All-optical control of coherent phonons in the candidate type-II Weyl semimetal WTe₂", Proc. SPIE 12681, Ultrafast Nonlinear Imaging and Spectroscopy XI, 126810A (5 October 2023); https://doi.org/10.1117/12.2690825

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