Electron-Beam-Driven Collective-Mode Metamaterial Light Source

被引：68
作者：
Adamo, G. [1 ,2 ,4 ]
Ou, J. Y. [1 ,4 ]
So, J. K. [1 ,4 ]
Jenkins, S. D. [3 ,4 ]
De Angelis, F. [5 ]
MacDonald, K. F. [1 ,4 ]
Di Fabrizio, E. [5 ]
Ruostekoski, J. [3 ,4 ]
Zheludev, N. I. [1 ,2 ,4 ]
机构：
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[2] Nanyang Technol Univ, Ctr Disrupt Photon Technol, Singapore 637371, Singapore
[3] Univ Southampton, Sch Math, Southampton SO17 1BJ, Hants, England
[4] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, Hants, England
[5] Ist Italiano Tecnol IIT, Dept Nanostruct, I-16163 Genoa, Italy
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 21期
基金：
英国工程与自然科学研究理事会;
关键词：
CATHODOLUMINESCENCE SPECTROSCOPY; LASERS; GENERATION; NANOSTRUCTURES; NANOANTENNA; RESONANCE; PLASMONS; EMISSION; SPASER;
D O I：
10.1103/PhysRevLett.109.217401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：5
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