Probing Ultrafast Dynamics of Anharmonically Coupled Phonons in Few-Layer Hexagonal Boron Nitride

Taehee Kang; Jia Zhang; Achintya Kundu; Klaus Reimann; Michael Woerner; Thomas Elsaesser; Bernard Gil; Guillaume Cassabois; Christos Flytzanis; Giorgia Fugallo; Michele Lazzeri; Ryan Page; Debdeep Jena

doi:10.1364/CLEO_QELS.2022.FM1A.7

Conference on Lasers and Electro-Optics
Technical Digest Series (Optica Publishing Group, 2022),
paper FM1A.7
•https://doi.org/10.1364/CLEO_QELS.2022.FM1A.7

Probing Ultrafast Dynamics of Anharmonically Coupled Phonons in Few-Layer Hexagonal Boron Nitride

Taehee Kang, Jia Zhang, Achintya Kundu, Klaus Reimann, Michael Woerner, Thomas Elsaesser, Bernard Gil, Guillaume Cassabois, Christos Flytzanis, Giorgia Fugallo, Michele Lazzeri, Ryan Page, and Debdeep Jena

CLEO: QELS_Fundamental Science 2022

San Jose, California United States
15–20 May 2022
ISBN: 978-1-957171-05-0

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Virtual: Exciton and Phonon Dynamics in Quantum Materials (FM1A)

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T. Kang, J. Zhang, A. Kundu, K. Reimann, M. Woerner, T. Elsaesser, B. Gil, G. Cassabois, C. Flytzanis, G. Fugallo, M. Lazzeri, R. Page, and D. Jena, "Probing Ultrafast Dynamics of Anharmonically Coupled Phonons in Few-Layer Hexagonal Boron Nitride," in Conference on Lasers and Electro-Optics, Technical Digest Series (Optica Publishing Group, 2022), paper FM1A.7.

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Abstract

Nonequilibrium dynamics of transverse optical (TO) phonons in few-layer hexagonal boron nitride is studied in mid-infrared pump-probe experiments. TO phonons display a 1.2 ps lifetime and a transient redshift due to anharmonic coupling with low-frequency interlayer modes.

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