About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Interpreting Through Depth Imaging of Acoustic Phonons via Dark-Field X-Ray Microscopy With Kinematic Diffraction |
Author(s) |
Darshan Chalise, Yifan Wang, Mariano Trigo, Leora Dresselhaus-Marais |
On-Site Speaker (Planned) |
Darshan Chalise |
Abstract Scope |
Dark Field X-ray Microscopy (DFXM) is a full-field x-ray imaging technique with excellent resolution in real and reciprocal space. DFXM at x-ray free electron lasers can visualize the dynamics of strain wave evolution from ultrafast laser excitation via the change in Bragg condition. Meanwhile, x-ray diffuse scattering enables reconstructing phonon band structures. In this talk, we will discuss a formalism to interpret DFXM signal via both change in the Bragg condition and phonon-induced diffuse scattering. We will discuss how measurements in coherent acoustic phonons can provide frequency resolved measurement of acoustic dissipation and how thermal diffuse scattering can be used for thermometry and thermal transport measurements. For both coherent phonon imaging and diffuse scattering, we will compare the tradeoffs and the limits of real and reciprocal space resolutions. Finally, we will discuss how the resolution provided by DFXM enables extending our understanding of phonon transport. |
Proceedings Inclusion? |
Undecided |