• Electrical Characterization of Silicon Cores from Glass-Cladded Fibres 

      Lapointe, Kyle (Master thesis, 2014)
      Semiconductor core fibres represent an emerging technology with potential applications in many areas, including photovoltaics and optical transmission. Recent advances in fibre manufacturing techniques has allowed long, ...
    • Electrodeposition of Metal Oxides for Solar Cell Applications 

      Fyhn, Anna Maren Andersen (Master thesis, 2012)
      This thesis investigates the electrodeposition process of zinc-, copper-, silver-, and silver copperoxides at cathodic and anodic voltages. Silver copper oxide has been successfully electrodepositedon a substrate of PtSi ...
    • Electronic and optical properties of doped Cu2O and ZnS thin films 

      Polyakov, Stanislav (Doctoral theses at NTNU;2017:107, Doctoral thesis, 2017)
      In this thesis, two earth-abundant, easily fabricated semiconductors, Cu2O and ZnS, were investigated to explore their electronic and optical properties after doping. Fe doped ZnS has been studied as a potential material ...
    • Er,Yb:GdAl3(BO3)4 laser passively Q-switched by MBE-grown Cr:ZnS thin films 

      Gorbachenya, Konstantin N.; Kisel, Victor E.; Yasukevich, Anatoly S.; Tolstik, Nikolai; Karhu, Eric Andrew; Furtula, Vedran; Sorokin, Evgeni; Maltsev, VA; leonyuk, N.; Galinis, A.; Lipinskas, T.; Gibson, Ursula; Sorokina, Irina T; Kuleshov, Nikolai V. (Chapter; Peer reviewed, 2017)
    • Evaluation of Acousto-Optic Tunable Filter for Wavelength Dependent Measurements of Waveguides 

      Sømnes, Vilde Aasvær (Master thesis, 2017)
      The main part of the work done for this master's thesis have been to implement and characterize a setup that would allow for wavelength dependent measurements of losses in waveguides. A plasma enhanced white light source ...
    • Evidence of chromium-cobalt binary cluster formation by pulsed laser evaporation 

      Burnin, Andrei; BelBruno, Joseph; Gibson, Ursula (Journal article, 2015)
      We report on the use of time of flight mass spectrometry to investigate the cluster spectrum resulting from Nd-YAG ablation of a Co-Cr target. Cr+ clusters dominated the spectrum, with Co+ clusters as the second most intense ...
    • Fiber Integrated Wavelength Converter Based on a Silicon core Fiber with a Nano-spike cCoupler 

      Huang, Meng; Ren, Haonan; Aktas, Ozan; Shen, Li; Wang, Jiang; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2019)
      Abstract—An all-fiber integrated nonlinear silicon photonicwavelength converter has been proposed and fabricated using thesilicon core fiber platform. The silicon fiber was spliced directly toa conventional single ...
    • Four-wave Mixing-based Wavelength Conversion and Parametric Amplification in Submicron Silicon Core Fibers 

      Wu, Dong; Shen, Li; Ren, Haonan; Huang, Meng; Lacava, Cosimo; Campling, Joseph; Sun, Shiyu; Hawkins, Thomas A.; Gibson, Ursula; Petropoulos, Periklis; Ballato, John; Peacock, Anna (Peer reviewed; Journal article, 2020)
      Silicon core fibers represent a versatile platform for all-fiber integrated nonlinear optical applications. This paper describes the state of the art in four-wave mixing-based parametric amplification, and wavelength ...
    • Ge-capped SiGe core optical fibers 

      Wu, Wei; Balci, Mustafa H.; Muhlberger, Korbinian; Fokine, Michael; Laurell, Fredrik; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2019)
      CO2 laser processing offers the possibility to inscribe structures within glass-clad SiGe-core fibers by altering the spatial distribution of the Si and Ge. Spatial segregation of Ge to the end of a fiber is shown via ...
    • Kerr nonlinear switching in a hybrid silica-silicon microspherical resonator 

      Suhailin, Fariza; Healy, N; Franz, Y; Sumetsky, Misha; Ballato, John; Dibbs, Andrew; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2015)
      A hybrid silicon-core, silica-clad microspherical resonator has been fabricated from the semiconductor core fiber platform. Linear and nonlinear characterization of the resonator properties have shown it to exhibit ...
    • Laser recrystallization and inscription of compositional microstructures in crystalline SiGe-core fibres 

      Coucheron, David Andre; Fokine, Michael; Patil, Nilesh; Breiby, Dag Werner; Buset, Ole Tore; Healy, Noel; Peacock, Anna; Hawkins, Thomas A.; Jones, Maxwell; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2016)
      Glass fibres with silicon cores have emerged as a versatile platform for all-optical processing, sensing and microscale optoelectronic devices. Using SiGe in the core extends the accessible wavelength range and potential ...
    • Laser restructuring and photoluminescence of glass-clad GaSb/Si-core optical fibres 

      Song, Seunghan; Lønsethagen, Kristin; Laurell, Fredrik; Hawkins, Thomas A.; Ballato, John; Fokine, Michael; Gibson, Ursula (Journal article; Peer reviewed, 2019)
      Semiconductor-core optical fibres have potential applications in photonics and optoelectronics due to large nonlinear optical coefficients and an extended transparency window. Laser processing can impose large temperature ...
    • Laser structuring, stress modification and Bragg grating inscription in silicon-core glass fibers 

      Fokine, Michael; Theodosiou, Antreas; Song, Seunghan; Hawkins, Thomas A.; Ballato, John; Kalli, Kyriacos; Gibson, Ursula (Journal article; Peer reviewed, 2017)
      Semiconductor core fibers have numerous potential applications in optoelectronics and photonics, and the key to realizing these opportunities is controlled processing of the material. We present results on laser treatments ...
    • Laser-induced spatial composition gradients in SiGe core fiber 

      Wu, Wei (Doctoral theses at NTNU;2020:219, Doctoral thesis, 2020)
      An important contributor to global warming is greenhouse gas emission caused by burning fuels such as oil and coal. To preserve the environment for the whole world and to simultaneously meet growing global energy demand, ...
    • Light trapping in horizontally aligned silicon microwire solar cells 

      Martinsen, Fredrik Aleksander; Smeltzer, Benjamin; Ballato, John; Jones, Maxwell; Hawkins, Thomas A.; Gibson, Ursula (Journal article; Peer reviewed, 2015)
      In this study, we demonstrate a solar cell design based on horizontally aligned microwires fabricated from 99.98% pure silicon via the molten core fiber drawing method. A similar structure consisting of 50 μm diameter close ...
    • Local Resistivity Measurement on Multicrystalline Silicon 

      Gebregiorgis, Ashenafi Weldemariam (Master thesis, 2012)
      Even though in the past the photovoltaic industry was dominated by single-crystalline silicon this days multi-crystalline silicon is consider to be on of the most promising material for application in low manufacturing ...
    • Localised structuring of metal-semiconductor cores in silica clad fibres using laser-driven thermal gradients 

      Song, Seunghan; Laurell, Fredrik; Meehan, Bailey; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula (Peer reviewed; Journal article, 2022)
      The molten core drawing method allows scalable fabrication of novel core fibres with kilometre lengths. With metal and semiconducting components combined in a glass-clad fibre, CO2 laser irradiation was used to write ...
    • Loss Measurements in Silicon Core Optical Waveguides 

      Eraker, Andreas Juvkam (Master thesis, 2013)
      Silicon core fibers have, because of their non-linear optical properties and transmission in the IR, recently been the focus of several different research groups. At NTNU, a new method for production of silicon fibers has ...
    • Low-loss silicon core fibre platform for mid-infrared nonlinear photonics 

      Ren, Haonan; Shen, Li; Runge, Antoine; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2019)
      Broadband mid-infrared light sources are highly desired for wide-ranging applications that span free-space communications to spectroscopy. In recent years, silicon has attracted great interest as a platform for nonlinear ...
    • Material properties of tapered crystalline silicon core fibers 

      Franz, Yohann; Runge, A. F.; Ren, Haonan; Healy, Noel; Ignatyev, K.; Jones, Maxwell; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2017)
      Crystalline silicon optical fibers are emerging as a promising platform for a wide range of optoelectronic applications. Here we report a crystallographic study of the material properties within silicon fibers that have ...