Blar i NTNU Open på forfatter "Dirdal, Christopher Andrew"

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    • Diamagnetism and the dispersion of the magnetic permeability 

      Dirdal, Christopher Andrew; Skaar, Johannes (Journal article; Peer reviewed, 2018)
      It is well known that the usual Kramers–Kronig relations for the relative permeability function μ(ω) are not compatible with diamagnetism (μ(0) < 1) and a positive imaginary part (Im μ(ω) > 0 for ω > 0). We demonstrate ...

    • Four definitions of magnetic permeability for periodic metamaterials 

      Skaar, Johannes; Hågenvik, Hans Olaf; Dirdal, Christopher Andrew (Journal article; Peer reviewed, 2019)
      We state and compare four different definitions of magnetic permeability for periodic, artificial media, or metamaterials. The connections among them, and properties in general, are discussed in detail, including causality, ...

    • Higher order multipoles in metamaterial homogenization 

      Dirdal, Christopher Andrew; Hågenvik, Hans Olaf; Haave, Haakon Aamodt; Skaar, Johannes (Journal article; Peer reviewed, 2018)
      The higher order multipoles above the electric quadrupole are commonly neglected in metamaterial homogenization. We show that they nevertheless can be significant when the second-order spatial dispersive effects, such as ...

    • Metamaterial effective parameters 

      Dirdal, Christopher Andrew (Doctoral theses at NTNU;2017:181, Doctoral thesis, 2017)
      Metamaterials are a class of composite materials acting as effectively continuous media, which are capable of realizing entirely new phenomena such as negative refraction and transformation optics. They have thereby opened ...

    • Negative Refraction in Non-Magnetic Metamaterials 

      Dirdal, Christopher Andrew (Master thesis, 2012)
      The discoveries and subsequent developments within the field of metamaterials have opened up for novel light-matter interactions towards the engineering of light behavior. The astonishing phenomenon of negative refraction ...