"Effects of the interaction between localized surface plasmons and rare-earth ion based solid-state gain media"

Who: Luisa Bausa (Dept. Fisica de Materiales and Instituto de Ciencia de Materiales Nicolas Cabrera, UAM)

Place: Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4 , Donostia

Date: Tuesday, 13 May 2014, 12:00



E. Yraola, P. Molina, M. O Ramírez and L.E. Bausá*

Dept. Física de Materiales and Instituto de Ciencia de Materiales NicolUniversidad Autónoma de Madrid, 28049-Madrid, Spain



The manipulation of light-matter interaction phenomena at the nanoscale by means of plasmonic nanostructures gives rise to a variety of unique effects that are currently the subject of an intense research activity from both fundamental and technological point of view. These effects relay in the ability of plasmonic nanostructures to strongly concentrate the electromagnetic field in the vicinity of their physical boundaries, enhancing the interactions between optical species (atoms, QDs, organic fluorophores, etc) and far-field light [1,2].

 Here, periodic arrays of Ag nanoparticles are photochemically assembled in chain-like form on the ferroelectric domain walls of Nd3+ doped periodically poled LiNbO3 laser crystals [3]. The coupling between the optical transitions of Nd3+ ions and the localized surface plasmon resonances supported by the metallic nanostructures results in a directional and periodic intensification of the Nd3+ emission. The mechanism of enhancement is analyzed taking into account the different polarization configurations [4].  

On the other hand, the implications of the plasmonic coupling on the laser parameters of the solid-state gain medium are evaluated to show a dramatic reduction of the pump power at the laser threshold. The results constitute a promising approach for gain-enhanced nanoplasmonic metamaterials, as well as for rare earth based nanolasers operating at the subwavelength scale.




[1] W. L. Barnes, A. Dereux and T. W. Ebbesen, Nature 424 (2003) 824.

[2] L. Novotny, N. van Hulst, Nature Photonics 5, (2011) 83.

[3] E. Yraola, P. Molina, J. L. Plaza, M. O Ramírez and L. E. Bausá, Advanced Materials 25 (2013) 910.

[4] P. Molina, E.Yraola, M. O Ramírez, J. Plaza, C. de las Heras, L. E. Bausá,  Nano Letters  13 (2013) 4931.

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