Bakgrunn og aktiviteter
Mitt forskningsområde; Nanofotoniske Komponenter og Materialer
I 2005 ble jeg utnevnt til professor i nanoelektronikk, nanofotonikk og nanomagnetisme som en del av NTNUs strategiske satsning på nanoteknologi. På Instituttet for Elektronikk og Telekommunikasjon leder jeg nå en forskningsgruppe som lager og karakteriserer nano-skala halvleder materialer som for eksempel nanotråder med kvanteprikker. Vi gror nanostrukturerne med molekylstråleepitaksi på vårt institutt sammen med professor Bjørn-Ove Fimland. Jeg studerer videre anvendelser av nanomaterialer i optiske komponenter som solceller, lasere, og sensorer. Av særlig interesse er elektrisk og optisk karakterisering av disse nanosystemene ved hjelp av teknikker som nano-luminescens mikroskopi.
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Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
Tidsskriftspublikasjoner
- (2015) Rectifying Single GaAsSb Nanowire Devices Based on Self-Induced Compositional Gradients. Nano letters (Print). vol. 15 (6).
- (2014) In-situ electrical and structural characterization of individual GaAs nanowires. Journal of Physics, Conference Series. vol. 522.
- (2014) Position-Controlled Uniform GaAs Nanowires on Silicon using Nanoimprint Lithography. Nano letters (Print). vol. 14 (2).
- (2014) Inducing a direct-to-pseudodirect bandgap transition in wurtzite GaAs nanowires with uniaxial stress. Nature Communications. vol. 5 (3655).
- (2013) Comparison of Be-doped GaAs nanowires grown by Au- and Ga-assisted molecular beam epitaxy. Journal of Crystal Growth. vol. 378.
- (2013) Controlling crystal phases in GaAs nanowires grown by Au-assisted molecular beam epitaxy. Nanotechnology. vol. 24 (1).
- (2013) Self-catalyzed MBE grown GaAs/GaAsxSb1-x core-shell nanowires in ZB and WZ crystal structures. Nanotechnology. vol. 24 (40).
- (2013) Compositional characterization of GaAs/GaAsSb nanowires by quantitative HAADF-STEM. Micron. vol. 44.
- (2013) Polarization dependent photocurrent spectroscopy of single wurtzite GaAs/AlGaAs core-shell nanowires. Applied Physics Letters. vol. 102 (14:142107).
- (2013) Numerical Analysis and Device Optimization of Radial p-n Junction GaAs/AlGaAs Core-Shell Nanowire Solar Cells. Numerical Simulation of Optoelectronic Devices (NUSOD), International Conference.
- (2013) Crystal phase engineering in self-catalyzed GaAs and GaAs/GaAsSb nanowires grown on Si(111). Journal of Crystal Growth. vol. 372.
- (2013) Advances in semiconductor nanowire growth on graphene. Physica Status Solidi. Rapid Research Letters. vol. 7 (10).
- (2013) The effects of Sb concentration variation on the optical properties of GaAsSb/GaAs heterostructured nanowires. Semiconductor Science and Technology. vol. 28 (11).
- (2013) Electrical, optical and structural properties of Al-doped ZnO thin films grown on GaAs(111)B substrates by pulsed laser deposition. Thin Solid Films. vol. 545.
- (2012) A Story Told by a Single Nanowire: Optical Properties of Wurtzite GaAs. Nano letters (Print). vol. 12 (12).
- (2012) Vertically Aligned GaAs Nanowires on Graphite and Few-Layer Graphene: Generic Model and Epitaxial Growth. Nano letters (Print). vol. 12 (9).
- (2012) Investigations of Bragg reflectors in nanowire lasers. Journal of Applied Physics. vol. 111 (12).
- (2012) Epitaxial relationships of ZnO nanostructures grown by Au-assisted pulsed laser deposition on c- and a-plane sapphire. Journal of Crystal Growth. vol. 355 (1).
- (2011) Photoluminescence Polarization Anisotropy in a Single Heterostructured III-V Nanowire with Mixed Crystal Phases. AIP Conference Proceedings. vol. 1399.
- (2011) Photocurrent Spectroscopy of Single Wurtzite GaAs Nanowires. AIP Conference Proceedings. vol. 1399.