Infrared near-field microscopy with the Vanderbilt free electron laser: overview and perspectives

Autor: Vobornik, D, Margaritondo, G, Sanghera, J.S, Thielen, P, Aggarwal, I.D, Ivanov, B, Miller, J.K, Haglund, R, Tolk, N.H, Congiu-Castellano, A, Rizzo, M.A, Piston, D.W, Somma, F, Baldacchini, G, Bonfigli, F, Marolo, T, Flora, F, Montereali, R.M, Faenov, A, Pikuz, T, Longo, G, Mussi, V, Generosi, R, Luce, M, Perfetti, P, Cricenti, A

Publikováno v: In Infrared Physics and Technology 2004 45(5):409-416

Ultrafast Surface-Plasmon Enhancement of Exciton and Defect Luminescence in ZnO Thin Films

Autor: Haglund R. F., Mu R., Lawrie B.J.

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

Externí odkaz: https://doaj.org/article/eab28a15175e4dcd8c25ca2889fff66d

Ultrafast Phase Transition in Vanadium Dioxide Driven by Hot-Electron Injection

Autor: Prasankumar R. P., Nag J., Seo M., Brady N. F., Appavoo K., Hilton D. J., Haglund R. F.

Publikováno v: EPJ Web of Conferences, Vol 41, p 03026 (2013)

We present a novel all-optical method of triggering the phase transition in vanadium dioxide by means of ballistic electrons injected across the interface between a mesh of Au nanoparticles coveringd VO2 nanoislands. By performing non-degenerate pump

Externí odkaz: https://doaj.org/article/7d56435424624b71ad9c5927112ed5fc

Optical Pump – THz Probe Response of VO2 under High Pressure

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: XXI. International Conference on Ultrafast Phenomena, 15.-20.07.2018, Hamburg, Deutschland
XXI International Conference on Ultrafast Phenomena, 15.-20.07.2018, Hamburg, DeutschlandProceedings of Ultrafast Phenomena XXI, 91944 Les Ulis cedex A-France: EDP Sciences Web of Conferences

We present the ultrafast THz response of VO2 under high pressures. A clear anomaly is observed around 8 GPa indicating a pressure-induced phase transition. Our observations can be interpreted in terms of a bandwidth-controlled Mott-Hubbard transition

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::dd0079430df1f35dc3073bdb26458e8e
https://www.hzdr.de/publications/Publ-28299-1

Bandwidth-controlled metallization in pressurized VO₂ revealed by optical pump – THz probe spectroscopy

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: Optical Terahertz Science and Technology (OTST 2017), 02.-07.04.2017, London, United Kingdom

Vanadium dioxide (VO₂) is a classic example of a transition metal oxide showing a sharp first- order insulator-to-metal transition (IMT) around 340 K accompanied by a pronounced structural transformation. Pressure-induced metallization of VO₂ has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::2a442e864fd1a10d56adef601469d3eb
https://www.hzdr.de/publications/Publ-26398-1