Abstract
We report our experimental results on two-dimensional left-handed metamaterials (LHM) exhibiting negative refraction and subwavelength imaging. Transmission and reflection spectra of LHM are studied and a left-handed transmission band is observed at the frequencies where both dielectric permittivity and magnetic permeability are negative. Impedance matching is verified both with the experiments and simulations. The two-dimensional LHM structure is verified to have a negative refractive index. We employed three different methods to observe negative refraction; refraction through prism-shaped LHM, beam shifting method, and phase shift experiments. We further demonstrated subwavelength imaging and resolution using LHM superlenses. The effect of thickness on the resolving power is investigated experimentally.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 108-115 |
| Number of pages | 8 |
| Journal | Photonics and Nanostructures - Fundamentals and Applications |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 2008 |
Funding
We thank I. Bulu and K. Guven for the helpful discussions. This work is supported by the European Union under the projects EU-NoE-METAMORPHOSE, EU-NoE-PHOREMOST, and TUBITAK under Projects Nos. 105E066, 105A005, 106E198 and 106A017. One of the authors (EO) also acknowledges partial support from the Turkish Academy of Sciences.
Keywords
- Left-handed material
- Metamaterial
- Negative refraction
- Subwavelength imaging
- Superlens
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Hardware and Architecture
- Electrical and Electronic Engineering