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Graphene Saturable Absorber Mirrors for 2-3 μm Lasers
(Master thesis, 2018)This thesis is devoted to the development of graphene saturable absorber mirrors for ultrafast applications in the mid-infrared. It covers from the fabrication of the graphene saturable absorber mirrors via graphene transfer ... -
Graphene-based extremely wide-angle tunable metamaterial absorber
(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 ... -
Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes
(Journal article; Peer reviewed, 2021)Flip-chip ultraviolet light-emitting diodes based on self-assembled GaN/AlGaN nanocolumns have been fabricated, exploiting single-layer graphene not only as a growth substrate but also as a transparent conducting electrode. ... -
Graphene-mode-locked Holmium Fiber Laser Operating Beyond 2.1 µm
(Chapter, 2015) -
Gravitational waves
(Master thesis, 2022)I denne oppgaven vil vi først se den svake feltgrensen til Einsteins feltligninger og den grunnleggende formalismen for gravitasjonelle bølger i den lineariserte teorien. Videre vil vi ta et skritt utenfor den lineariserte ... -
Gravity Wave Climatology for Trondheim using a Meteor Radar.
(Master thesis, 2013)In this thesis, a gravity wave climatology for the altitude range of the airglow (hydroxyl) layer of 83 to 91km have been made using data from a meteor radar located at Dragvoll (64,4$^{o}$N, 10,5$^{o}$E) in Trondheim. The ... -
Gravity Wave Refraction in the Atmosphere:: Ray tracing versus Geometric Location from a Single Image
(Master thesis, 2013)This thesis presents two methods of finding the sources of gravity waves observed in the night-time hydroxyl airglow; ray-tracing and geometric localisation by fitting concentric circles onto the curvature of the gravity ... -
Green’s Function Approach to Quantum Phenomena in Heterostructures with Spin- Polarization and Coherence
(Doctoral theses at NTNU;2023:238, Doctoral thesis, 2023)Kvantemekanikken som muliggjør fremtidens informasjonsteknologi Moderne datamaskiner produserer en mengde varme som er sammenlignbart med varmen fra panelovner. Denne varmeproduksjonen, sammen med utfordringer relatert ... -
Ground-Based UV Measurements, Aerosol Effects on UV Radiation
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:39, Doctoral thesis, 2009) -
Growth and Characterization of Germanium Quantum Dots and Crystalline Silicon
(Master thesis, 2011)Germanium quantum dots in a silicon matrix can be used in so-called intermediate band solar cells. Such solar cells have efficiency limits exceeding that of the conventional single junction solar cells. In this master ... -
Growth and characterization of ZnO thin films to be utilized inorganic/inorganic solar cells
(Master thesis, 2009) -
Growth study of self-assembled GaN nanocolumns on silica glass by plasma assisted molecular beam epitaxy
(Journal article; Peer reviewed, 2017)We demonstrate GaN nanocolumn growth on fused silica glass by plasma-assisted molecular beam epitaxy. The effect of the substrate temperature, Ga flux and N2 flow rate on the structural and optical properties are studied. ... -
Grunnleggende elektrisitetsforståelse blant førsteårs-studentene ved studieprogrammene elektronisk systemdesign og innovasjon og kybernetikk og robotikk ved NTNU
(Master thesis, 2021)I denne studien er det forsøkt å besvare problemstillingen: Hva kjennetegner den grunnleggende elektrisitetsforståelsen til førsteårsstudenter ved studieprogrammene elektronisk systemdesign og innovasjon og kybernetikk og ... -
HAADF-STEM and DFT investigations of the Zn-containing β'' phase in Al-Mg-Si alloys
(Journal article, 2014)The Zn-containing β″ phase in Al–Mg–Si alloys was investigated by aberration corrected high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), combined with density functional theory (DFT) ... -
Handling Discontinuities in Numerical ODE Methods
(Master thesis, 2021)Et vanlig ønske i mange typer arbeid er å finne den fremgangsmåten som gir best resultat uten å kreve for mye innsats. For eksempel så krever modellering av hvordan forurensende stoffer sprer seg i havet at man beregner ... -
Hardness and Microstructure for Ge-Containing Al-Mg-Si-Cu alloys
(Master thesis, 2012)Four different Al-Mg-Si-Cu-Ge alloys with 0.002--0.037 at.\% germanium were heat treated to the T6 condition and over-aged at 250$^{\circ}$C for up to 100 hours. The hardness was tested during the over-ageing and there ... -
Harnessing thermoelectric power from transient heat sources: Waste heat recovery from silicon production
(Journal article; Peer reviewed, 2017)Thermoelectric generators (TEGs) are compact and robust devices for converting heat into electrical power. In this work, we investigate the response of a bismuth-telluride based TEG to the transient environment of a silicon ... -
Head-On Beam-Beam Interactions in High-Energy Hadron Colliders - GPU-Powered Modelling of Nonlinear Effects
(Master thesis, 2017)The performance of high-energy circular hadron colliders, as the Large Hadron Collider, is limited by beam-beam interactions. The strength of the beam-beam interactions will be higher after the upgrade to the High-Luminosity ... -
Heat Control in Composite Overwrapped Pressure Vessels: Modeling and Simulation Approaches
(Bachelor thesis, 2024)En composite overwraped pressure vessel fylt med nitrogengass på høyt trykk har blitt studert. Når tanken fylles, øker den indre energien til gassen, noe som igjen varmer opp tankveggen. Det ytterste vegglaget mister sin ...