Coherent meta-materials and the lasing spaser
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.
Cite
@article{arxiv.0802.2519,
title = {Coherent meta-materials and the lasing spaser},
author = {N. I. Zheludev and S. L. Prosvirnin and N. Papasimakis and V. A. Fedotov},
journal= {arXiv preprint arXiv:0802.2519},
year = {2010}
}