Title
Negative index metamaterials based on metal-dielectric nanocomposites for imaging applications
Abstract
Negative index metamaterials are demonstrated based on metal-dielectric nanocomposites prepared using a versatile bottom-up nanofabrication approach. The method involves the incorporation of vertically aligned metal nanowires such as Au and Ag inside dielectric aluminum oxide nanotemplates. Optical absorbance measurements show resonance peaks corresponding to the transverse and longitudinal surface plasmon modes. A quantitative model based on effective medium theory is in excellent agreement with experimental data, and points to specific composite configurations and wavelength regimes where such structures can have applications as negative refraction media for imaging.
Keywords
aluminium compounds, dielectric materials, gold, infrared spectra, metamaterials, nanocomposites, nanotechnology, nanowires, optical materials, plasmons, refractive index, silver, ultraviolet spectra, visible spectra
Disciplines
Nanoscience and Nanotechnology | Optics
Publisher
American Institute of Physics
Publication Date
9-25-2008
Rights Information
© 2008 American Institute of Physics
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Menon, L.; Lu, W. T.; Friedman, A. L.; Bennett, S. P.; Heiman, D.; and Sridhar, S., "Negative index metamaterials based on metal-dielectric nanocomposites for imaging applications" (2008). Physics Faculty Publications. Paper 532. http://hdl.handle.net/2047/d20002680
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figure1.zip (2162 kB)Figure 1
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figure3.zip (2188 kB)
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Notes
Originally published in Applied Physics Letters 93, 123117 (2008). DOI:10.1063/1.2945647