Negative refraction through an impedance- matched left-handed metamaterial slab
نویسنده
چکیده
We report the transmission and reflection characteristics of a two-dimensional (2D) left-handed metamaterial (LHM). A well-defined left-handed (LH) transmission band with a peak value of −9.9 dB is obtained at frequencies where both effective permittivity and permeability are negative. A very sharp dip −38 dB at the reflection spectrum due to impedance matching at the surface of a 2D LHM is observed. Gaussian beam shifting experiments are performed to study the LH properties of a LHM structure. The structure has a negative refraction of electromagnetic waves in a certain frequency range. The negative refractive index values obtained for four different incident angles are in good agreement. © 2006 Optical Society of America OCIS codes: 120.7000, 120.5700, 120.5710, 260.2110.
منابع مشابه
Simulation , Modeling and Analysis of Glass Slab as Left Handed Metamaterial using Finite Element Method
w w w . i j e c t . o r g Abstract This paper presents two-dimensional simulation of electromagnetic metamaterial with left-handed properties. Numerical modeling of glass slab with negative index of refraction has been done using Finite Element Method (FEM). The design strategies have been discussed for selection of proper wavelength and geometry to demonstrate negative refraction through the m...
متن کاملFocusing of electromagnetic waves by a left-handed metamaterial flat lens.
We present here the experimental results from research conducted on negative refraction and focusing by a two-dimensional (2D) left-handed metamaterial (LHM) slab. By measuring the refracted electromagnetic (EM) waves from a LHM slab, we find an effective refractive index of -1.86. A 2D scanning transmission measurement technique is used to measure the intensity distribution of the EM waves tha...
متن کاملNegative refraction and imaging beyond the diffraction limit by a two-dimensional left-handed metamaterial
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...
متن کاملBilayer metamaterial: analysis of left-handed transmission and retrieval of effective medium parameters
We report an experimental and numerical analysis of a planar metamaterial designed for normal-to-plane propagation, and operating at microwave frequencies. The metamaterial consists of cutwire and wire patterns, which are arranged periodically on both sides of a dielectric layer, in the form of a bilayer. The left-handed transmission band of the metamaterial is demonstrated experimentally. The ...
متن کاملTransmission, refraction, and focusing properties of labyrinth based left-handed metamaterials
In this present article, we studied the transmission, refraction and focusing properties of one, two and three dimensional labyrinth based left-handed metamaterials. We demonstrated that the proper periodic arrangement of labyrinth structures and wires results in left-handed transmission. By using a two dimensional labyrinth based left-handed slab, it is shown that it is possible to image the f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006