Super-resolved time-frequency measurements of coupled phonon dynamics in a 2D quantum material.

ABSTRACT: Methods to probe and understand the dynamic response of materials following impulsive excitation are important for many fields, from materials and energy sciences to chemical and neuroscience. To design more efficient nano, energy, and quantum devices, new methods are needed to uncover the dominant excitations and reaction pathways. In this work, we implement a newly-developed superlet transform-a super-resolution time-frequency analytical method-to analyze and extract phonon dynamics in a laser-excited two-dimensional (2D) quantum material. This quasi-2D system, 1T-TaSe₂, supports both equilibrium and metastable light-induced charge density wave (CDW) phases mediated by strongly coupled phonons. We compare the effectiveness of the superlet transform to standard time-frequency t

SUBMITTER: Gentry C 

PROVIDER: S-EPMC9672042 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature