Carbone, Fabrizio and Barwick, Brett and Kwon, Oh-Hoon and Park, Hyun Soon and Baskin, J. Spencer and Zewail, Ahmed H. (2009) EELS femtosecond resolved in 4D ultrafast electron microscopy. Chemical Physics Letters, 468 (4-6). pp. 107-111. ISSN 0009-2614 http://resolver.caltech.edu/CaltechAUTHORS:CARcpl09
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Electron energy loss spectroscopy (EELS) is a powerful tool in the study of valency, bonding and structure of solids. Previously, EEL spectra were either time-integrated or at best time-resolved on the millisecond to seconds scale, being limited by video rates and detector responses. Here, using our 4D electron microscope, we report ultrafast EELS, taking the time resolution in the energy–time space into the femtosecond regime, a 10 order of magnitude increase, and for a table-top apparatus. It is shown that the energy–time–amplitude space of graphite is selective to changes, especially in the electron density of the π + σ plasmon of the collective oscillation of the four electrons of carbon.
|Additional Information:||Copyright © 2008 Elsevier. Received 25 November 2008; accepted 9 December 2008. Available online 16 December 2008. This work was supported by the National Science Foundation and the Air Force Office of Scientific Research in the Gordon and Betty Moore Center for Physical Biology at Caltech. The authors thank Profs. Marlina A. Elburg and Petra Rudolf for providing the raw crystals.|
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|Deposited On:||02 Feb 2009 23:41|
|Last Modified:||26 Dec 2012 10:46|
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