Compensating substrate-induced bianisotropy in optical metamaterials using ultrathin superstrate coatings
نویسندگان
چکیده
منابع مشابه
Substrate-induced bianisotropy in metamaterials
Optical metamaterials usually consist of a patterned metal-dielectric composite structure mounted on a substrate. They are designed to exhibit exotic properties, such as a negative refractive index. The design process usually aims to achieve the maximum possible symmetry, to better approximate an ideal isotropic material. In fabricating optical metamaterials, it is important to have straight si...
متن کاملCompensating losses in negative-index metamaterials by optical parametric amplification.
Optical parametric amplification controlled by the auxiliary electromagnetic field enables transparency, amplification, and oscillation with no cavity in strongly absorbing negative-index metamaterials. The opposite directions of the wave vector and the Poynting vector in such materials result in extraordinary optical properties, including "backward" phase matching and the generation of entangl...
متن کاملLow-threshold optical bistabilities in ultrathin nonlinear metamaterials.
Optical bistability typically occurs only when the optical thickness in the device or the input light power is unfavorably large. Here we show that, for a class of plasmonic metamaterials consisting of ultrathin holey metallic plates filled with nonlinear materials, the optical bistability can occur with an ultralow excitation power. We present a realistic design working at 0.2 THz and perform ...
متن کاملLoss/gain-induced ultrathin antireflection coatings
Tradional antireflection coatings composed of dielectric layers usually require the thickness to be larger than quarter wavelength. Here, we demonstrate that materials with permittivity or permeability dominated by imaginary parts, i.e. lossy or gain media, can realize non-resonant antireflection coatings in deep sub-wavelength scale. Interestingly, while the reflected waves are eliminated as i...
متن کاملExperimental demonstration of sidewall angle induced bianisotropy in multiple layer negative index metamaterials
The effect of a nonzero sidewall angle on the performance of multiple layer fishnet-structure one to three functional layers negative index metamaterials is evaluated experimentally. The fabrication-induced sidewall angle results in a bianisotropy inhomogeneous asymmetry that is significant at optical frequencies. Good agreement is obtained between the experimental transmission and reflectance ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2013
ISSN: 1094-4087
DOI: 10.1364/oe.21.005594