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

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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.
Original languageEnglish
Title of host publicationProceedings of SPIE
Number of pages7
PublisherSPIE - International Society for Optical Engineering
Publication date2023
ISBN (Print)9781510665767
DOIs
Publication statusPublished - 2023
EventSPIE Optical Engineering + Applications - San Diego, United States
Duration: 20 Aug 202325 Aug 2023

Conference

ConferenceSPIE Optical Engineering + Applications
Country/TerritoryUnited States
CitySan Diego
Period20/08/202325/08/2023
SeriesProceedings of SPIE - The International Society for Optical Engineering
Volume12681
ISSN0277-786X

Keywords

  • Coherent phonon
  • Weyl semimetal
  • Ultrafast spectroscopy

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