Blar i NTNU Open på forfatter "Aksnes, Astrid"
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A finite element model of plasmonic particle arrays for glucose sensing by surface-enhanced Raman scattering
Malyshev, Roman (Master thesis, 2020)Optiske biosensorer basert på overflate-forsterket Ramanspredning (SERS) har vært forsket på i flere tiår, grunnet deres store applikasjonsområde. Kontinuerlige blodsukkermålinger er en anvendelse der slike innretninger ... -
A miniaturized ball-lensed fiber optic NIR transmission spectroscopy-based glucose sensor
Fuglerud, Silje Skeide; Milenko, Karolina Barbara; Larsen Jernelv, Ine; Ellingsen, Reinold; Aksnes, Astrid; Hjelme, Dag Roar (Chapter, 2018)A novel ball-lensed fiber transmission sensor is presented aimed at in vivo continuous glucose monitoring of diabetics. Preliminary results yield 20 mM RMSE, limited by mechanical instability. The design enables flexibility ... -
A rangefinder for measuring vibrations of structures - Optical-FMCW interferometry
Grodås, Lars Christian Eriksson (Master thesis, 2014)The optical Frequency Modulated Continuous Wave (FMCW) technique along with utilizing the Doppler shift was investigated for the application of monitoring distance to and oscillation of a bridge. The equipment was borrowed ... -
A Review of Optical Methods for Continuous Glucose Monitoring
Jernelv, Ine Larsen; Milenko, Karolina Barbara; Fuglerud, Silje Skeide; Hjelme, Dag Roar; Ellingsen, Reinold; Aksnes, Astrid (Journal article; Peer reviewed, 2018)Frequent glucose monitoring is a fundamental part of diabetes management, and good glucose control is important for long-term health outcomes. New types of electrochemical sensors that allow for continuous glucose monitoring ... -
Analysis of infrared spectroscopy data using deep learning
Furuseth, Christian (Master thesis, 2021)Convolutional neural network (CNN) er en ofte brukt deep learning metode for å analysere spektroskopi data. CNN har vist bedre resultater sammenlignet med mer tradisjonelle metoder som partial least squares regression ... -
Beyond the 2D limit: étendue-squeezing line-focus solar concentrators
Johnsen, Håkon Jarand Dugstad; Aksnes, Astrid; Torgersen, Jan (Peer reviewed; Journal article, 2020)Line-focus solar concentrators are commonly designed by extruding a two-dimensional concentrator in the third dimension. For concentration in air, these concentrators are, by the nature of their design, limited by the ... -
Biocompatible bonding of a rigid off-stoichiometry thiol-ene-epoxy polymer microfluidic cartridge to a biofunctionalized silicon biosensor
Sønstevold, Linda; Yadav, Mukesh; Arnfinnsdottir, Nina Bjørk; Herbjørnrød, Aina Kristin; Jensen, Geir Uri; Aksnes, Astrid; Mielnik, Michal Marek (Journal article; Peer reviewed, 2022) -
Centre for Digital Life Norway - Annual report 2017
Johansen, Finn-Eirik; Brautaset, Trygve; Aune, Marie Hjelmseth; Patriksson, Alexandra; Falkenberg, Liv Eggset; Kleppe, Rune; Dick, Gunnar; Strand, Berit Løkensgard; Eijsink, Vincent; Røyne, Anja; Goksøyr, Anders; Svendsen, John Sigurd Mjøen; Fyhn, Marianne; Vik, Jon Olav; Wentzel, Alexander; Aksnes, Astrid; Bruheim, Per; Carlsen, Sven Magnus; Åm, Heidrun (Research report, 2018) -
Characterization and Signal Processing of Mach-Zehnder Assisted Ring Resonator Configuration Sensors
Stensø, Nikolai (Master thesis, 2022)Bruken av nanofotonikk i anvendelsen av biosensorer er et tverrfaglig vitenskapsområde som har tiltrukket mye oppmerksomhet, samt utviklet seg hurtig i senere år. Muligheten å integrere flere fotoniske strukturer på en ... -
Characterization of Solar Cell Wafers with Low Coherence Interferometry
Simonsen, Ove (Master thesis, 2011)Characterize silicon wafers used in solar cell production with a NIR-LCI interferometer. The interferometer is further developed and measurements on silicon samples are carried out. -
Coupling of light from telescope into single mode fiber
Grønning, Knut Rudberg (Master thesis, 2006)A preliminary tip/tilt correction system was designed and implemented to demonstrate the principles of tip/tilt correction of a 633nm laser beam. Two mirrors mounted on one-axis rotation stages were used, one to simulate ... -
Design and Simulations of Silicon-on-Insulator Long-Period Grating Couplers for Nanophotonic Sensor Applications
Sundgaard, Peter N. (Master thesis, 2023)Denne masteroppgaven fokuserer på design, simulering og fabrikkering av silisium-på-isolator (SOI) langperiodiske gitterkoblinger (LPG) for bruk i integrerte fotoniske kretser. Slike nanofotoniske sensorer basert på små, ... -
Design, fabrication and characterisation of silicon nitride nanophotonic biosensor components
Knain, Idunn (Master thesis, 2016)This master thesis is dedicated to silicon photonic components; their design, fabrication and characterisation. Waveguides are the fundamental component in the new and exciting field of interferometric biosensors. Their ... -
Development of a Nanophotonic Silicon Nitride Waveguide Sensor Platform for Use in SERS
Ekern, Joakim (Master thesis, 2023)Overflateforsterket Ramanspredning (SERS) er en kraftfull og ikke-ødeleggende sensorteknikk basert på å eksitere vibrasjonsnivåene til et molekyl. Dette resulterer i et unikt emisjonsspekter — et slags molekykært fingeravtrykk ... -
Development of tunable Y-junction laser diodes for trace-gas sensing applications
Tran, Thanh-Nam (Doctoral theses at NTNU;2023:422, Doctoral thesis, 2023)Y-junction laser diodes are promising light sources needed for trace-gas sensing systems based on tunable diode-laser absorption spectroscopy. The merit of this laser structure is the fabrication simplicity and the ability ... -
Fabrication of a Silicon Photonic Crystal Biosensor
Bolstad, Torstein (Master thesis, 2014)The research performed in the scope of the master project and described in this thesis is devoted to the study of a two dimensional photonic crystal biosensor in silicon. The band gap of hexagonal photonic crystal slab ... -
Feasibility of supercontinuum sources for use in glucose sensing by absorption spectroscopy
Fuglerud, Silje Skeide; Milenko, Karolina Barbara; Ellingsen, Reinold; Aksnes, Astrid; Hjelme, Dag Roar (Journal article; Peer reviewed, 2019)Diabetes mellitus 1 requires tight control of the blood glucose levels to avoid harmful effects of either too high (hyperglycemia) or too low (hypoglycemia) blood sugar. Due to the availability of low-cost components, ... -
Fiber optic probes for biomedical optical spectroscopy
Bru, Jørgen (Master thesis, 2008)Optical spectroscopy has been well validated by the physical sciences as a method to characterize chemical compositions in biological material. It has also showed promising to detect atherosclerotic plaques, which can form ... -
Flat Optics for Compact Augmented Reality Systems: Diffractive Optical Elements and Metasurfaces
Pedersen, Ole Bjørn Eithun (Master thesis, 2021)I denne masteroppgaven presenterer vi fire forskjellige flat-optikk (flat optics) implementeringer av to klassiske arkitekturer for utvidet virkelighet (AR): stråledeler-arkitekturen og friform-arkitekturen. Tradisjonelt ... -
Free-standing tantalum pentoxide waveguides for gas sensing in the mid-infrared
Vlk, Marek; Datta, Anurup; Alberti, Sebastian; Murugan, Ganapathy Senthil; Aksnes, Astrid; Jagerska, Jana (Peer reviewed; Journal article, 2021)Typical applications of integrated photonics in the mid-infrared (MIR) are different from near-infrared (telecom) range and, in many instances, they involve chemical sensing through MIR spectroscopy. Such applications ...