CUED Publications database

Advanced spectroscopies of graphene and 2D materials

Pietralunga, SM and Manzoni, C and Carpene, E and Bugini, D and Dal Conte, S and Hedayat, H and Soavi, G and Vahid, MJ and Virgili, T and Zani, M and Dallera, C and Sordan, R and Tagliaferri, A and Cerullo, G (2016) Advanced spectroscopies of graphene and 2D materials. In: UNSPECIFIED.

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© 2016 IEEE. A full exploitation of the unique features of graphene and related 2D materials in micro and nano-scaled optoelectronic devices for high-data rate photonic systems calls for a deep understanding of their fundamental structural, electronic, photophysical properties and fast dynamics. We introduce some advanced spectroscopic techniques developed to this aim, while reviewing their specific potentialities and highlighting recent results. To provide absolute local nanoscale thickness metrology of as-grown 2D materials, Scanning Auger Electron Microspectroscopy has been calibrated. Results obtained for graphene and graphene oxide (GO) are reported, showing sub-monolayer resolution. Ultrafast optical transient absorption spectroscopy, with temporal resolution down to 10fs, unveils the rel axation dynamics of hot electrons in single layer graphene and the formation and radiative recombination via stimulated emission of biexcitons in ultra-narrow, structurally well-defined nanoribbons (GNRs). By recently developed ultrafast Time- and Angle-resolved Photo-Electron Spectroscopy (TR-ARPES) we investigate electronic states and spin dynamics close to the Dirac cone, in graphene and metal chalcogenide topological insulators (TI) under fs strong laser excitation, in view of spintronic applications.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:07
Last Modified: 22 May 2018 07:38