期刊
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
卷 10, 期 3, 页码 276-280出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.photonics.2011.05.003
关键词
Fishnet metamaterial; Gain materials; Loss compensation; Magnetic resonance
资金
- Department of Energy (Basic Energy Sciences) [DE-AC02-07CH11358]
- European Community FET project PHOME [213390]
- Laboratory-Directed Research and Development Program at Sandia National Laboratories
- National Natural Science Foundation of China [60931002]
We present a computational approach, allowing for a self-consistent treatment of three-dimensional (3D) fishnet metamaterial operating at 710 nm wavelength coupled to a gain material incorporated into the nanostructure. We show numerically that loss-free negative index material is achievable by incorporating gain material inside the fishnet structure. The effective gain coefficient of the combined fishnet-gain system is much larger than its bulk counterpart and the figure-of-merit (FOM = vertical bar Re(n)/Im(n)vertical bar) increases dramatically with gain. Transmission, reflection, and absorption data, as well as the retrieved effective parameters, are presented for the fishnet structure with and without gain. Published by Elsevier B.V.
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