Zobrazeno 1 - 10
of 1 323
pro vyhledávání: '"M C Hoffmann"'
Autor:
Y. Liu, D. M. Sanchez, M. R. Ware, E. G. Champenois, J. Yang, J. P. F. Nunes, A. Attar, M. Centurion, J. P. Cryan, R. Forbes, K. Hegazy, M. C. Hoffmann, F. Ji, M.-F. Lin, D. Luo, S. K. Saha, X. Shen, X. J. Wang, T. J. Martínez, T. J. A. Wolf
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-9 (2023)
Abstract Electrocyclic reactions are characterized by the concerted formation and cleavage of both σ and π bonds through a cyclic structure. This structure is known as a pericyclic transition state for thermal reactions and a pericyclic minimum in
Externí odkaz:
https://doaj.org/article/ed44685a2ea142f5808a40f87dc5ca34
Autor:
M. P. Jiang, S. Fahy, A. Hauber, É. D. Murray, I. Savić, C. Bray, J. N. Clark, T. Henighan, M. Kozina, A. M. Lindenberg, P. Zalden, M. Chollet, J. M. Glownia, M. C. Hoffmann, T. Sato, D. Zhu, O. Delaire, A. F. May, B. C. Sales, R. Merlin, M. Trigo, D. A. Reis
Publikováno v:
Structural Dynamics, Vol 9, Iss 2, Pp 024301-024301-10 (2022)
We report the observation of photo-induced plasmon–phonon coupled modes in the group IV–VI semiconductor PbTe using ultrafast x-ray diffuse scattering at the Linac Coherent Light Source. We measure the near-zone-center excited-state dispersion of
Externí odkaz:
https://doaj.org/article/52b178575c2941b8bad05b03d6f8db37
Autor:
E. Iacocca, T.-M. Liu, A. H. Reid, Z. Fu, S. Ruta, P. W. Granitzka, E. Jal, S. Bonetti, A. X. Gray, C. E. Graves, R. Kukreja, Z. Chen, D. J. Higley, T. Chase, L. Le Guyader, K. Hirsch, H. Ohldag, W. F. Schlotter, G. L. Dakovski, G. Coslovich, M. C. Hoffmann, S. Carron, A. Tsukamoto, A. Kirilyuk, A. V. Kimel, Th. Rasing, J. Stöhr, R. F. L. Evans, T. Ostler, R. W. Chantrell, M. A. Hoefer, T. J. Silva, H. A. Dürr
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-11 (2019)
The understanding of the magnetisation evolution upon femtosecond optical pumping remains elusive. The authors perform resonant X-ray magnetic scattering measurements and multiscale simulations that reveal rapid magnetic order recovery in ferrimagnet
Externí odkaz:
https://doaj.org/article/8141d7a85b3f47a3aaf25c708166a279
Autor:
M. P. Jiang, M. Trigo, I. Savić, S. Fahy, É. D. Murray, C. Bray, J. Clark, T. Henighan, M. Kozina, M. Chollet, J. M. Glownia, M. C. Hoffmann, D. Zhu, O. Delaire, A. F. May, B. C. Sales, A. M. Lindenberg, P. Zalden, T. Sato, R. Merlin, D. A. Reis
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016)
Group IV–VI materials often exist in a state near an electronic or structural phase transition. Here, the authors use ultrafast X-ray scattering to show that coupling of band-edge electrons and phonons causes the ferroelectric instability observed
Externí odkaz:
https://doaj.org/article/83f4952e5a204f1b813f568524223b8f
Akademický článek
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Autor:
M. Kozina, T. van Driel, M. Chollet, T. Sato, J. M. Glownia, S. Wandel, M. Radovic, U. Staub, M. C. Hoffmann
Publikováno v:
Structural Dynamics, Vol 4, Iss 5, Pp 054301-054301-7 (2017)
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
Externí odkaz:
https://doaj.org/article/75b8ba40430c496f82a10d9fef96d839
Publikováno v:
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1d3445e81842938383a53613a2fca32
https://doi.org/10.1109/irmmw-thz50927.2022.9895642
https://doi.org/10.1109/irmmw-thz50927.2022.9895642
Autor:
R. K. Li, M. C. Hoffmann, E. A. Nanni, S. H. Glenzer, M. E. Kozina, A. M. Lindenberg, B. K. Ofori-Okai, A. H. Reid, X. Shen, S. P. Weathersby, J. Yang, M. Zajac, X. J. Wang
Publikováno v:
Physical Review Accelerators and Beams, Vol 22, Iss 1, p 012803 (2019)
We demonstrate single-shot temporal characterization of relativistic electron bunches using single-cycle terahertz (THz) field streaking. A transverse deflecting structure consisting of a metal slit enables efficient coupling of the THz field and ele
Externí odkaz:
https://doaj.org/article/5042d17613a44a14b3474fbbdcf70199
Publikováno v:
2022 IEEE International Conference on Plasma Science (ICOPS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2bedb59d42013793e105eb53b6ab496
https://doi.org/10.1109/icops45751.2022.9813009
https://doi.org/10.1109/icops45751.2022.9813009
Publikováno v:
Conference on Lasers and Electro-Optics.
We show a method for detection and correction of the time-of-arrival jitter of electron bunches generated from an rf photoeinjector through Terahertz time-stamping, subsequently improving the temporal resolution of pump-probe UED measurements.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34b4d36c3b06eb51af8cb63e1f7d88ee
https://doi.org/10.1364/cleo_si.2022.stu4l.3
https://doi.org/10.1364/cleo_si.2022.stu4l.3