Ultrafast photoresponse of superconductor/ferromagnet nano-layered hybrids

Pepe, G.P. et al. (2009) Ultrafast photoresponse of superconductor/ferromagnet nano-layered hybrids. IEEE Transactions on Applied Superconductivity, 19(3), pp. 376-381. (doi: 10.1109/TASC.2009.2018251)

Abstract

Interactions of superconducting nanostructures with external optical radiation represent a very interesting topic in both the framework of nonequilibrium physics and photodetector applications. Heterogeneous nano-layers, such as proximized superconductor/normal metal and superconductor/ferromagnet (S/F) bilayers, are very promising since they exhibit the ultrafast Cooper-pair and quasiparticle dynamics. We have characterized Nb/NiCu, NbN/NiCu, YBaCuO/Au/NiCu, and YBaCuO/LaSrMnO proximized S/F nano-bilayers, using time-resolved, all-optical, femtosecond pump-probe spectroscopy measurements down to 4 K. Our experiments demonstrate that these bilayers are very promising for novel, ultrafast photodetection and spintronics device applications. Moreover, our time-resolved studies of the carrier dynamics in oxide-based S/F structures open the way to novel basic-physics investigations of nonequilibrium effects in correlated systems.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Casaburi, Dr Alessandro
• Authors: Pepe, G.P., Pan, D., Pagliarulo, V., Parlato, L., Marrocco, N., De Lisio, C., Peluso, G., Barone, A., di Uccio, U.S., Casaburi, A., Tafuri, F., Khafizov, M., Taneda, T., and Sobolewski, R.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: IEEE Transactions on Applied Superconductivity
• ISSN: 1051-8223