منابع مشابه
Opaque perfect lenses
The response of the “perfect lens”, consisting of a slab of lossless material of thickness d with εs = μs = −1 at one frequency ω0 is investigated. It is shown that as time progresses the lens becomes increasingly opaque to any physical TM line dipole source located a distance d0 < d/2 from the lens and which has been turned on at time t = 0. Here a physical source is defined as one which suppl...
متن کاملPerfect cylindrical lenses.
A slab of negatively refracting material is known to focus light and if 1 n = the focussing will be perfect, producing an image which is an exact replica of the object. Magnifying the image requires a new design concept in which the surface of the negatively refracting lens is curved. Here we show how a hollow cylinder of material can be designed to magnify an image but otherwise with the same ...
متن کاملOn Perfect Lenses and Nihility
The canonical problem of a perfect lens with linear bianisotropic materials is formulated. Its solution is shown to be directly connected with the concept of nihility, the electromagnetic nilpotent. Perfect lenses as well as nihility remain unrealizable.
متن کاملEffects of surface waves on the behavior of perfect lenses
Backwards-wave ~BW! materials, which have simultaneously negative permittivity and permeability, support electromagnetic waves with phase propagation in the direction opposite to power flow. At an interface between BW materials and free space, the normal component of the wave vector changes sign. In the case of an evanescent wave, this leads to growth of the field amplitude inside the BW materi...
متن کاملBirefringent left-handed metamaterials and perfect lenses for vectorial fields
We describe the properties of specific non-reflecting birefringent left-handed metamaterials and demonstrate a birefringent perfect lens for vectorial fields. We predict that, in a sharp contrast to the concept of a conventional perfect lens realized at = μ = −1 (where is the dielectric permittivity and μ is the magnetic permeability), the birefringent left-handed slab possesses the property of...
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ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 2007
ISSN: 0921-4526
DOI: 10.1016/j.physb.2006.12.010