1 You have signs of infection, such as: 2  Increased pain, swelling, warmth, or redness around the bite. 3  Red streaks leading from the bite. 4  Pus draining from the bite.  A fever.
A negative index of refraction due to three-dimensional chirality is demonstrated for abilayered metamaterial based on pairs of mutually twisted planar metal patterns in parallel planes, which alsoshows negative electric and magnetic responses and exceptionally strong optical activity and circular dichro-ism.
(b) Gate-dependent refractive index changes at Î´ t = 1 ps. The large index contrast Î´ Re(n) â â2.4 and the red-shift of the resonance are clearly visible. (c) Photo-excited conductivity changes (red circle) in the active graphene layer of the metamaterial at a pump fluence of 18.7 Î¼ J/cm 2 near the CNP.