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Browsing Háskólinn í Reykjavík by Subject "Rafmagnsverkfræði"

Browsing Háskólinn í Reykjavík by Subject "Rafmagnsverkfræði"

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    Geometry Modification Assessment and Design Optimization of Miniaturized Wideband Antennas 
    Muhammad Aziz Ul Haq (Reykjavik University, School of Science and Engineering, 2019-05-17)
    Maintaining small physical dimensions of antenna structures is an important consideration for contemporary wireless communication systems. Typically, antenna miniaturization is achieved through various topological modifications of the basic antenna ...
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    Piezoresistance characterization of silicon nanowires in uniaxial and isostatic pressure variation 
    Aghabalaei Fakhri, Elham; Plugaru, Rodica; Sultan, Muhammad Taha; Kristinsson, Thorsteinn; Árnason, Hákon Örn; Plugaru, Neculai; Manolescu, Andrei; Ingvarsson, Snorri; Svavarsson, Halldor (MDPI AG, 2022-08-23)
    Silicon nanowires (SiNWs) are known to exhibit a large piezoresistance (PZR) effect, making them suitable for various sensing applications. Here, we report the results of a PZR investigation on randomly distributed and interconnected vertical silicon ...
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    Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions 
    Carney, Daniel; Svavarsson, Halldor; Hemmati, Hafez; Fannin, Alexander; Yoon, Jae; Magnusson, Robert (MDPI AG, 2019-02-21)
    Fabrication and sensor application of a simple plasmonic structure is described in this paper. The sensor element consists of nano-patterned gold film brought about from two-dimensional periodic photoresist templates created by holographic laser ...
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    Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors 
    Stanescu, Tudor D; Sitek, Anna; Manolescu, Andrei (Beilstein Institut, 2018-05-22)
    We consider core–shell nanowires with prismatic geometry contacted with two or more superconductors in the presence of a magnetic field applied parallel to the wire. In this geometry, the lowest energy states are localized on the outer edges of the ...
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    Simulation of short pulse photoemission in a microdiode with implications for optimal beam brightness 
    Árnason, Hákon Örn; Torfason, Kristinn; Manolescu, Andrei; Valfells, Ágúst (Institute of Electrical and Electronics Engineers (IEEE), 2024)
    Molecular dynamics simulations, with full Coulomb interaction, are used to model short-pulse photoemission from a finite area in a microdiode. We demonstrate three emission regimes, source-limited emission, space-charge-limited emission for short pulses, ...
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    Thermoelectric current in topological insulator nanowires with impurities 
    Erlingsson, Sigurdur I.; Bardarson, Jens H; Manolescu, Andrei (Beilstein Institut, 2018-04-12)
    In this paper we consider charge current generated by maintaining a temperature difference over a nanowire at zero voltage bias. For topological insulator nanowires in a perpendicular magnetic field the current can change sign as the temperature of one ...