Negative refractive index due to chirality is obtained in the near infrared range of the spectrum for either left or right polarization.doi:10.1016/j.optcom.2013.10.070Giloan, M.Astilean, S.Elsevier B.V.Optics CommunicationsGiloan, M., Astilean, S.: Negative index optical chiral metamaterial...
Negative refractive index due to chirality We demonstrate experimentally and numerically that metamaterials based on bilayer cross wires give giant optical activity, circular dichroism, and negative... J Zhou,J Dong,B Wang,... - 《Physical Review B Condensed Matter》 被引量: 354发表: 2009年 ...
To achieve these unique properties, metamaterials consisting of plasmonic nano-objects are promising, due to the phenomena that can result in coupled modes on miniarrays33, strong-coupling of localized and propagating modes on hole-arrays in metal films34. The Babinet complementary patterns are except...
This structure does not require any resonance to realize negative refraction and therefore it has a broad ΔλW that includes the visible range without additional losses due to resonance. The dispersion relation of HMMs was derived using effective medium theory35,36 (EMT) and using this relation,...
To achieve this goal, we can still use three degree of freedom, i.e., we can change x, the concentration of tin in Pb1−xSnxTe , and f1,f2,f3, relative fractions of components of the composite [in fact only two of them are independent due to relation (6)]. If at this point...
The term “left-handed” is somewhat unfortunate as it may suggest a (non-existing) relation to the phenomenon of chirality, as discussed below. A convex lens made of a negative-index material could be defocusing rather than focusing, and a concave lens could be focusing. Even a simple ...
Inserting additional sites in the adjacent layers does not break the mirror symmetry with respect to the x-z plane, so that the net topological charge of the two kx-ky planes in Figure 1(c) is zero and the mirror symmetric Weyl points have opposite chirality. However, the nonzero Chern ...
Controlling the thermal expansion of materials is of great technological importance. Uncontrolled thermal expansion can lead to failure or irreversible destruction of structures and devices. In ordinary crystals, thermal expansion is governed by the asym
An asymmetric atom (chirality center) is the traditional example of this stereogenic unit; (b) a chain of four non-coplanar atoms (or rigid groups) in a stable conformation, such that an imaginary or real (restricted) rotation (with a change of sign of the torsion angle) about the ...
Large and tunable negative refractive index (NRI) via electromagnetically induced chirality is demonstrated in a semiconductor quantum wells (SQWs) nanostructure by using the reported experimental parameters in J.F. Dynes et al., Phys. Rev. Lett. 94 , 157403 (2005). It is found: the large ...