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Your search keyword '"Glownia, J. M."' showing total 6 results
Start Over Author "Glownia, J. M." Journal structural dynamics
6 results on '"Glownia, J. M."'

1. Observation of photo-induced plasmon–phonon coupling in PbTe via ultrafast x-ray scattering

Author

Jiang, M. P., primary, Fahy, S., additional, Hauber, A., additional, Murray, É. D., additional, Savić, I., additional, Bray, C., additional, Clark, J. N., additional, Henighan, T., additional, Kozina, M., additional, Lindenberg, A. M., additional, Zalden, P., additional, Chollet, M., additional, Glownia, J. M., additional, Hoffmann, M. C., additional, Sato, T., additional, Zhu, D., additional, Delaire, O., additional, May, A. F., additional, Sales, B. C., additional, Merlin, R., additional, Trigo, M., additional, and Reis, D. A., additional

Published
2022
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2. Heterodyne x-ray diffuse scattering from coherent phonons

Author

Kozina, M., primary, Trigo, M., additional, Chollet, M., additional, Clark, J. N., additional, Glownia, J. M., additional, Gossard, A. C., additional, Henighan, T., additional, Jiang, M. P., additional, Lu, H., additional, Majumdar, A., additional, Zhu, D., additional, and Reis, D. A., additional

Published
2017
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5. Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3.

Author

Kozina, M., van Driel, T., Chollet, M., Sato, T., Glownia, J. M., Wandel, S., Radovic, M., Staub, U., and Hoffmann, M. C.

Subjects
X-ray diffraction, STRONTIUM titanate, CRYSTAL lattices
Abstract

We use ultrafast X-ray pulses to characterize the lattice response of SrTiO3 when driven by strong terahertz fields. We observe transient changes in the diffraction intensity with a delayed onset with respect to the driving field. Fourier analysis reveals two frequency components corresponding to the two lowest energy zone-center optical modes in SrTiO3. The lower frequency mode exhibits clear softening as the temperature is decreased while the higher frequency mode shows slight temperature dependence. [ABSTRACT FROM AUTHOR]

Published
2017
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6. Activation of coherent lattice phonon following ultrafast molecular spin-state photo-switching: A molecule-to-lattice energy transfer.

Author

Marino, A., Cammarata, M., Collet, E., Matar, S. F., Létard, J. -F., Chastanet, G., Chollet, M., Glownia, J. M., and Lemke, H. T.

Subjects
PHOTONS, LATTICE dynamics, ENERGY transfer
Abstract

We combine ultrafast optical spectroscopy with femtosecond X-ray absorption to study the photo-switching dynamics of the [Fe(PM-AzA)2(NCS)2] spin-crossover molecular solid. The light-induced excited spin-state trapping process switches the molecules from low spin to high spin (HS) states on the sub-picosecond timescale. The change of the electronic state (<50 fs) induces a structural reorganization of the molecule within 160 fs. This transformation is accompanied by coherent molecular vibrations in the HS potential and especially a rapidly damped Fe-ligand breathing mode. The time-resolved studies evidence a delayed activation of coherent optical phonons of the lattice surrounding the photoexcited molecules. [ABSTRACT FROM AUTHOR]

Published
2016
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