Coherent meta-materials and the lasing spaser

Zheludev, N.I., Prosvirnin, S.L., Papasimakis, N. and Fedotov, V.A. (2008) Coherent meta-materials and the lasing spaser. 6th International Workshop on Nanophotonics, Taipei, Taiwan. 11 Mar 2008. 5 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In 2003 Bergman and Stockman introduced the spaser, a quantum amplifier of surface plasmons by stimulated emission of radiation [1]. They argued that, by exploiting a metal/dielectric composite medium, it should be possible to construct a nano-device, where a strong coherent field is built up in a spatial region much smaller than the wavelength [1, 2]. V-shaped metallic inclusion, combined with a collection of semiconductor quantum dots were discussed as a possible realization of the spaser [1]. Here we introduce a further development of the spaser concept. We show that by combining the metamaterial and spaser ideas one can create a narrow-diversion coherent source of electromagnetic radiation that is fuelled by plasmonic oscillations. We argue that two-dimensional arrays of a certain class of plasmonic resonators supporting high-Q coherent current excitations provide an intriguing opportunity to create spatially and temporally coherent laser source, the Lasing Spaser.

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