Complex modes and near-zero permittivity in 3D arrays of plasmonic nanoshells: loss compensation using gain [Invited]
Open Access
- 6 September 2011
- journal article
- research article
- Published by Optica Publishing Group in Optical Materials Express
- Vol. 1 (6), 1077-1089
- https://doi.org/10.1364/ome.1.001077
Abstract
We report on the possibility of adopting active gain materials (specifically, made of fluorescent dyes) to mitigate the losses in a 3D periodic array of dielectric-core metallic-shell nanospheres. We find the modes with complex wavenumber in the structure, and describe the composite material in terms of homogenized effective permittivity, comparing results from modal analysis and Maxwell Garnett theory. We then design two metamaterials in which the epsilon-near-zero frequency region overlaps with the emission band of the adopted gain media, and we show that metamaterials with effective parameters with low losses are feasible, thanks to the gain materials. Even though fluorescent dyes embedded in the nanoshells’ dielectric cores are employed in this study, the formulation provided is general, and could account for the usage of other active materials, such as semiconductors and quantum dots.Keywords
This publication has 41 references indexed in Scilit:
- Dispersed and Encapsulated Gain Medium in Plasmonic Nanoparticles: a Multipronged Approach to Mitigate Optical LossesACS Nano, 2011
- Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheresJournal of the Optical Society of America B, 2011
- Spasers explainedNature Photonics, 2008
- CNP optical metamaterialsOptics Express, 2008
- Magnetic plasmonic metamaterials in actively pumped host medium and plasmonic nanolaserPhysical Review B, 2007
- Dye-Labeled Silver Nanoshell−Bright ParticleThe Journal of Physical Chemistry B, 2006
- Kramers-Kronig relations in optical data inversionPhysical Review B, 1991
- Comparison among Several Numerical Integration Methods for Kramers-Kronig TransformationApplied Spectroscopy, 1988
- Numerical analysis of short laser pulse superposition in a fluorescent dye mediumCanadian Journal of Physics, 1979
- Optical Constants of the Noble MetalsPhysical Review B, 1972