Browsing NTNU Open by Author "Halterman, Klaus"
Now showing items 1-5 of 5
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Comparison of optical response from DFT random phase approximation and a low-energy effective model: Strained phosphorene
Alidoust, Mohammad; Isachsen, Erlend E; Halterman, Klaus; Akola, Jaakko (Peer reviewed; Journal article, 2021)The engineering of the optical response of materials is a paradigm that demands microscopic-level accuracy and reliable predictive theoretical tools. Here we compare and contrast the dispersive permittivity tensor, using ... -
Dynamical tuning between nearly perfect reflection, absorption, and transmission of light via graphene/dielectric structures
Linder, Jacob; Halterman, Klaus (Journal article; Peer reviewed, 2016)Exerting well-defined control over the reflection (R), absorption (A), and transmission (T) of electromagnetic waves is a key objective in quantum optics. To this end, one often utilizes hybrid structures comprised of ... -
Graphene-based extremely wide-angle tunable metamaterial absorber
Linder, Jacob; Halterman, Klaus (Journal article; Peer reviewed, 2016)We investigate the absorption properties of graphene-based anisotropic metamaterial structures where the metamaterial layer possesses an electromagnetic response corresponding to a near-zero permittivity. We find that ... -
Strain-engineered widely tunable perfect absorption angle in black phosphorus from first principles
Alidoust, Mohammad; Halterman, Klaus; Pan, Douxing; Willatzen, Morten; Akola, Jaakko (Peer reviewed; Journal article, 2020)Using the density functional theory of electronic structure, we compute the anisotropic dielectric response of bulk black phosphorus subject to strain. Employing the obtained permittivity tensor, we solve Maxwell’s equations ... -
Superconducting spintronics with magnetic domain walls
Linder, Jacob; Halterman, Klaus (Journal article, 2014)The recent experimental demonstration of spin-polarized supercurrents offers a venue for establishment of a superconducting analog to conventional spintronics. Whereas domain-wall motion in purely magnetic structures is a ...