Electron-beam-driven collective-mode metamaterial light source

We demonstrate experimentally that the energy from a highly localized free-electron-beam excitation can be converted via a planar plasmonic metamaterial to a low-divergence free-space light beam. This emission, which emanates from a collectively oscillating coupled metamolecule nanoantenna ensemble...

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Bibliographic Details
Published in:Physical review letters 2012-11, Vol.109 (21), p.217401-217401, Article 217401
Main Authors: Adamo, G, Ou, J Y, So, J K, Jenkins, S D, De Angelis, F, MacDonald, K F, Di Fabrizio, E, Ruostekoski, J, Zheludev, N I
Format: Article
Language:English
Subjects:
Electromagnetic Phenomena
Electrons
Light
Nanostructures - chemistry
Optics and Photonics - methods
Surface Plasmon Resonance
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Summary:We demonstrate experimentally that the energy from a highly localized free-electron-beam excitation can be converted via a planar plasmonic metamaterial to a low-divergence free-space light beam. This emission, which emanates from a collectively oscillating coupled metamolecule nanoantenna ensemble much larger in size than the initial excitation, is distinctly different from cathodoluminescence and bears some similarity with laser light. It offers a novel, flexible paradigm for the development of scalable, threshold-free light sources.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.109.217401