کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1543090 | 997427 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Negative refraction and imaging beyond the diffraction limit by a two-dimensional left-handed metamaterial Negative refraction and imaging beyond the diffraction limit by a two-dimensional left-handed metamaterial](/preview/png/1543090.png)
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.
Journal: Photonics and Nanostructures - Fundamentals and Applications - Volume 6, Issue 1, April 2008, Pages 108–115