Experimental Demonstration of Near-Infrared Negative-Index Metamaterials
Abstract
Metal-based negative refractive-index materials have been extensively studied in the microwave region. However, negative-index metamaterials have not been realized at near-IR or visible frequencies due to difficulties of fabrication and to the generally poor optical properties of metals at these wavelengths. In this Letter, we report the first fabrication and experimental verification of a transversely structured metal-dielectric-metal multilayer exhibiting a negative refractive index around 2μm. Both the amplitude and the phase of the transmission and reflection were measured experimentally, and are in good agreement with a rigorous coupled wave analysis.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2005
- DOI:
- 10.1103/PhysRevLett.95.137404
- arXiv:
- arXiv:physics/0504208
- Bibcode:
- 2005PhRvL..95m7404Z
- Keywords:
-
- 78.20.Ci;
- 42.25.Bs;
- 42.79.Dj;
- Optical constants;
- Wave propagation transmission and absorption;
- Gratings;
- Physics - Optics
- E-Print:
- 16 pages, 5 figures, submitted to Physical Review Letters on March 07, 2005