Zobrazeno 1 - 10
of 46
pro vyhledávání: '"R. F. Haglund"'
Autor:
T. G. Folland, A. Fali, S. T. White, J. R. Matson, S. Liu, N. A. Aghamiri, J. H. Edgar, R. F. Haglund, Y. Abate, J. D. Caldwell
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
Here, the authors demonstrate that the dispersion of hyperbolic phonon polaritons can be controlled using the permittivity changes inherent in the different phases of phase change materials. This enables direct launching, reflection, transmission and
Externí odkaz:
https://doaj.org/article/38afe449ba1447a7bab25094f699d814
Autor:
A. S. Johnson, D. Pérez-Salinas, K. M. Siddiqui, S. Kim, S. Choi, K. Volckaert, P. E. Majchrzak, S. Ulstrup, K. Hallman, R. F. Haglund, C. M. Günther, B. Pfau, S. Eisebitt, D. Backes, F. Maccherozzi, A. Fitzpatrick, S. Dhesi, P. Gargiani, M. Valvidares, H. Choi, D. Jang, A. Katoch, S. Kwon, S. H. Park, H. Kim, S. E. Wall
Publikováno v:
Johnson, A S, Pérez-Salinas, D, Siddiqui, K M, Choi, S, Volckaert, K, Majchrzak, P E, Ulstrup, S, Hallman, K, Haglund, R F, Günther, C M, Pfau, B, Eisebitt, S, Backes, D, Maccherozzi, F, Fitzpatrick, A, Dhesi, S, Gargiani, P, Valvidares, M, Choi, H, Jang, D, Katoch, A, Kwon, S, Kim, H & Wall, S E 2022, Ultrafast X-Ray hyperspectral imaging of the photo-induced phase transition in VO 2 . in International Conference on Ultrafast Phenomena, UP 2022 ., Tu3A.2, Optica Publishing Group (formerly OSA), International Conference on Ultrafast Phenomena, UP 2022, Montreal, Canada, 18/07/2022 . https://doi.org/10.1364/UP.2022.Tu3A.2
We use the PAL FEL to obtain time and energy-resolved coherent diffractive images of the insulator-metal phase transition in VO2 with femtosecond time, and nanometer spatial resolution, enabling us to directly visualize the phase transition.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36029b328f9793ccad9a37161b411ef3
https://pure.au.dk/portal/da/publications/ultrafast-xray-hyperspectral-imaging-of-the-photoinduced-phase-transition-in-vo2(70cb14d9-85b6-4883-8c34-924169d0c159).html
https://pure.au.dk/portal/da/publications/ultrafast-xray-hyperspectral-imaging-of-the-photoinduced-phase-transition-in-vo2(70cb14d9-85b6-4883-8c34-924169d0c159).html
Publikováno v:
Journal of Physics: Conference Series. 59:651-656
Poly(amic acid) (PAA), a precursor to polyimide, was successfully deposited on substrates without reaching curing temperature, by resonant infrared pulsed laser ablation. The PAA was prepared by dissolving pyromellitic dianhydride and 4, 4' oxidianil
Publikováno v:
EPJ Web of Conferences, Vol 41, p 04016 (2013)
Femtosecond pump-probe and photoluminescence measurements in transmission and reflection show that ultraviolet band-edge and visible defect luminescence in ZnO films can be selectively enhanced by coupling to Ag surface-plasmon polaritons or localize
Publikováno v:
SPIE Proceedings.
Multi-layered polymer light-emitting diodes (PLEDs) have been fabricated in a vacuum environment by resonant infrared pulsed-laser deposition of the polymer layers. The light emitter used was poly[2-methoxy-5-(2- ethylhexyloxy)-1,4-phenylenevinylene]
Autor:
M. R. Papantonakis, R. F. Haglund
Publikováno v:
SPIE Proceedings.
Polytetrafluoroethylene (PTFE, trade name Teflon) has a wide range of unique and desirable physical, electrical and chemical properties. Its tribological properties are well-suited to anti-stiction applications, and its chemical inertness commends it
Autor:
Glenn S. Edwards, S James Allen, R. F. Haglund, R.J. Nemanich, B. Redlich, John D. Simon, W. C. Yang
Publikováno v:
Photochemistry and photobiology. 81(4)
Free-Electron Lasers (FELs) collectively operate from the terahertz through the ultraviolet range and via intracavity Compton backscattering into the X-ray and gamma-ray regimes. FELs are continuously tunable and can provide optical powers, pulse str
Publikováno v:
Physical review letters. 93(17)
The size effects on the optical properties of vanadium dioxide nanoparticles in ordered arrays have been studied. Contrary to previous VO2 studies, we observe that the optical contrast between the semiconducting and metallic phases is dramatically en
Publikováno v:
Applied Physics Letters. 65:1751-1753
We report measurements of ultraviolet‐laser‐induced desorption of atoms, ions, and molecules from the surface of single‐crystal, Y‐cut lithium niobate at intensities below the plasma threshold. Particularly striking is the desorption of LiNbO
Publikováno v:
MRS Proceedings. 650
Ion implantation has become a versatile and powerful technique for synthesizing nanometer-scale clusters and crystals embedded in the near-surface region of a variety of hosts. The resulting nanocomposite materials often show unique optical, magnetic