Journal
OPTICS LETTERS
Volume 34, Issue 4, Pages 443-445Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.000443
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Funding
- National Science Foundation (NSF) [BES-0608934]
- Multidisciplinary University Research Initiative (MURI) [50432-PH-MUR]
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A new bottom-up approach for fabricating the optical metamaterial is reported. An array of metal nanoparticle clusters can provide both electric and magnetic activity in the optical frequency region through the excitation of the collective plasmon resonance. A two-dimensional square array of gold nanoparticle clusters (nanoclusters) was fabricated by using the template-directed colloidal selfassembly. The optical measurements showed strong extinction peaks in the near-infrared region owing to the electric resonance supported by the nanoclusters. The peak positions were in excellent agreement with the numerical simulations. The metal nanocluster metamaterial represents a promising new architecture for an optical metamaterial that can be fabricated by a scalable bottom-up fabrication technique. (c) 2009 Optical Society of America
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