Probing Nonequilibrium Phonon-Magnon Coupling in Emerging Functional Materials with Femtosecond Transient Thermal and Spin Grating Spectroscopy
Abstract
Major Goals: The major goal of this project is to acquire equipment and components to develop a state-of-the-art transient grating spectroscopy setup that can flexibly generate periodic thermal and spin excitations with subpicosecond time resolution and diffraction-limited spatial resolution. Once developed, this system will be used to study phonon and magnon transport and their interactions in magnetic materials. These fundamental studies can enable more efficient coupling between heat and magnetism with potential applications in energy harvesting and conversion, spintronics, and magnetic refrigeration. Accomplishments: Within the award period, we have successfully acquired all major components budgeted in the proposal and are now in the process of developing the proposed femtosecond transient grating spectroscopy setup. The main optical paths have been built and we are conducting the final alignment and fine-tuning of the setup. We expect the transient grating spectroscopy to be fully operational by the end of 2021. A picture of the transient grating spectroscopy setup under construction is included in the attachment. Training Opportunities: Although this grant does not provide direct personnel support, one postdoc scholar (Taeyong Kim) and one graduate student (Yujie Quan) at UCSB obtained the training experience to build, test and fine-tune the transient grating spectroscopy setup that is supported by this DURIP grant. In the process, they were trained on the principles of ultrafast optical spectroscopy, optical design and instrumentation, control software development, and the properties of magnetic materials. Results Dissemination: We expect the proposed setup to be fully functional by the end of 2021 and we will start disseminating results from this setup by publishing papers and giving conference presentations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 03, 2021
- Accession Number
- AD1208845
Entities
People
- Bolin Liao
Organizations
- University of California, Santa Barbara