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Resolution limit in near field opticsNear field imagingsystem:zxaPoint sourcedIn the near field, a ≪ λSample w/two objectsWe sample the object using many evanescent wavese +ik ∥xe −ik ∥xk ⊥k ∥+ all possible k ||e −k ∥zNow have access to imaginary k ⊥ !2π/λ = k ∥ 2 + k ⊥2k ∥,max ~2π/ad min ~a/2Largest k ∥ ≫ 2π/λk ⊥ ~ik ∥For near field optics, resolution islimited only by distance to source6/27/13 Bruker Nano Surfaces7