Ultrafast spectroscopy provides important information about the excitation and relaxation dynamics occurring in complex nanomaterials. These capabilities enable coherent quantum control experiments, as well as experiments for dynamic materials characterization.
Capabilities include:
- Femtosecond broadband transient absorption spectroscopy (infrared to ultraviolet) with microscopic spatial resolution.
- Can be done at low temperatures (down to 4 K) and high magnetic fields (up to 8 T).
- Capability to both photoexcite and probe complex materials over a broad wavelength range.
- Degenerate and non-degenerate four-wave mixing.
- Static and time-resolved second harmonic generation.
- Static and time-resolved magneto-optical Faraday and Kerr spectroscopy.
- Ultrafast scanning tunneling microscopy.
- Femtosecond spectral interferometry.
- Coherent control with an amplitude/phase LC-SLM pulse shaper.
Contacts:
Hou-Tong Chen
Prashant Padmanabhan
Research Highlights:
Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs
Sirica, N.; Orth, P. P.; Scheurer, M. S.; Dai, Y. M.; Lee, M.-C.; Padmanabhan, P.; Mix, L. T.; Teitelbaum, S. W.; Trigo, M.; Zhao, L. X.; Chen, G. F.; Xu, B.; Yang, R.; Shen, B.; Hu, C.; Lee, C.-C.; Lin, H.; Cochran, T. A.; Trugman, S. A.; Zhu, J.-X.; Hasan, M. Z.; Ni, N.; Qiu, X. G.; Taylor, A. J.; Yarotski, D. A.; Prasankumar, R. P. Nature Materials 2021, 21 (1), 62–66. doi.org/10.1038/s41563-021-01126-9.
Coherent helicity-dependent spin-phonon oscillations in the ferromagnetic van der Waals crystal CrI3 Padmanabhan, P.; Buessen, F. L.; Tutchton, R.; Kwock, K. W.; Gilinsky, S.; Lee, M. C.; McGuire, M. A.; Singamaneni, S. R.; Yarotski, D. A.; Paramekanti, A.; Zhu, J.-X.; Prasankumar, R. P. Coherent Helicity-Dependent Spin-Phonon Oscillations in the Ferromagnetic van Der Waals Crystal Cri3.
Nature Communications 2022,
13 (1). doi.org/10.1038/s41467-022-31786-3.
