Bilde av Hellesø, Olav Gaute
Photo: Bjørn-Kåre Iversen
Bilde av Hellesø, Olav Gaute
Department of Physics and Technology olav.gaute.helleso@uit.no +4777645297 Tromsø TEK 3.060

Olav Gaute Hellesø


Professor / Head of department

Job description

Head of Department of Physics and Technology, member of the research group for Ultrasound, Microwaves and Optics, and professor in optics


  • Mathias Novik Jensen, Olav Gaute Hellesø :
    Evaluation of crystalline structure quality of Czochralski-silicon using near-infrared tomography
    Journal of Crystal Growth 2022 ARKIV / DOI
  • Mathias Novik Jensen, Olav Gaute Hellesø :
    Measuring the end-face of silicon boules using mid-infrared laser scanning
    CrysteEngComm 09. June 2021 DOI
  • Mathias Novik Jensen, Olav Gaute Hellesø :
    Measuring the end-face of silicon boules using mid-infrared laser scanning
    CrysteEngComm 2021 DOI
  • Rabiul Hasan, Olav Gaute Hellesø :
    Dielectric optical nanoantennas
    Nanotechnology 2021 ARKIV / DOI
  • Øystein Ivar Helle, Firehun Tsige Dullo, Marcel Lahrberg, Jean-Claude Tinguely, Olav Gaute Hellesø, Balpreet Singh Ahluwalia :
    Structured illumination microscopy using a photonic chip
    Nature Photonics 11. May 2020 DOI
  • Olav Gaute Hellesø :
    Optical pressure and numerical simulation of optical forces
    Applied Optics 2017 DOI
  • Balpreet Singh Ahluwalia, Øystein Ivar Helle, Olav Gaute Hellesø :
    Rib waveguides for trapping and transport of particles
    Optics Express 2016 ARKIV / DOI
  • Firehun Tsige Dullo, Martin Ingvaldsen, Jana Jágerská, Svein Ketil Jacobsen, Olav Gaute Hellesø :
    Temperature Sensitivity of a Waveguide Young Interferometer
    IEEE Photonics Technology Letters 2016 DOI
  • Susan Mariah Lindecrantz, Jean-Claude Tinguely, Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Characterization of a waveguide Mach-Zehnder interferometer using PDMS as a cover layer
    Journal of the European Optical Society - Rapid Publications 2015 ARKIV / DOI
  • Øystein Ivar Helle, Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Optical transport, lifting and trapping of micro-particles by planar waveguides
    Optics Express 2015 ARKIV / DOI
  • Balpreet Singh Ahluwalia, Peter Anthony McCourt, Ana Oteiza, James S. Wilkinson, Thomas Rolf Huser, Olav Gaute Hellesø :
    Squeezing red blood cells on an optical waveguide to monitor cell deformability during blood storage
    The Analyst 2015 DOI
  • Firehun Tsige Dullo, Jean-Claude Tinguely, Stian Solbø, Olav Gaute Hellesø :
    Single-mode limit and bending losses for shallow Rib Si3N4 waveguides
    IEEE Photonics Journal 2015 ARKIV / DOI
  • Firehun Tsige Dullo, Susan Lindecrantz, Jana Jagerska, Jørn H Hansen, Stig Olov Magnus Engqvist, Stian Solbø et al.:
    Sensitive on-chip methane detection with a cryptophane-A cladded Mach-Zehnder interferometer
    Optics Express 2015 ARKIV / DATA / DOI
  • Firehun Tsige Dullo, Olav Gaute Hellesø :
    On-chip phase measurement for microparticles trapped on a waveguide
    Lab on a Chip 2015 DOI
  • Susan Lindecrantz, Olav Gaute Hellesø :
    Estimation of propagation losses for narrow strip and rib waveguides
    IEEE Photonics Technology Letters 2014 DOI
  • Jean-Claude Tinguely, Ming Ding, Gilberto Brambilla, A Hohenau, J. R. Krenn, Olav Gaute Hellesø :
    Nanostructured fibre tip for trapping of nanoparticles
    Proceedings of SPIE, the International Society for Optical Engineering 25. February 2014 DOI
  • Balpreet Singh Ahluwalia, Peter Anthony McCourt, Ana Oteiza, James S. Wilkinson, Thomas Rolf Huser, Olav Gaute Hellesø :
    Squeezing red blood cells with the evanescent field of an optical waveguide to monitor cell deformability during blood storage
    The Analyst 2014 DOI
  • Balpreet Singh Ahluwalia, Petter Brox, Øystein Ivar Helle, Jean-Claude Tinguely, Olav Gaute Hellesø :
    Near-field waveguide trapping and tracking of particles using fluorescence imaging
    SPIE - The International Society for Optics and Photonics 2014 DOI
  • Balpreet Singh Ahluwalia, Peter Anthony McCourt, James S. Wilkinson, Thomas Huser, Olav Gaute Hellesø :
    Optical deformation of red blood cells trapped on a narrow waveguide
    SPIE - The International Society for Optics and Photonics 2014 DOI
  • Susan Lindecrantz, Firehun Tsige Dullo, Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Sensitivity of Mach-Zehnder interferometer for dissolved gas monitoring
    SPIE - The International Society for Optics and Photonics 2014 DOI
  • Firehun Tsige Dullo, Viktor Sokolov, Chauvet Cyprien, Susan Lindecrantz, Stian Solbø, Olav Gaute Hellesø :
    Temperature sensitivity of waveguide Mach-Zehnder interferometer
    Proceedings of SPIE, the International Society for Optical Engineering 08. March 2014 DOI
  • Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Optical waveguide loop for planar trapping of blood cells and microspheres
    Proceedings of SPIE, the International Society for Optical Engineering 2013 DOI
  • Pål Løvhaugen, Balpreet Singh Ahluwalia, Thomas Rolf Huser, Olav Gaute Hellesø :
    Serial Raman spectroscopy of particles trapped on a waveguide
    Optics Express 2013 ARKIV / DOI
  • Olav Gaute Hellesø, Pål Løvhaugen, Ananth Z. Subramanian, James S. Wilkinson, Balpreet Singh Ahluwalia :
    Surface transport and stable trapping of particles and cells by an optical waveguide loop
    Lab on a Chip 2012 DOI
  • Balpreet Singh Ahluwalia, Pål Løvhaugen, Olav Gaute Hellesø :
    Waveguide trapping of hollow glass spheres
    Optics Letters 2011 DOI
  • Pål Løvhaugen, Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Optical waveguide trapping forces on hollow glass spheres
    Proceedings of SPIE, the International Society for Optical Engineering 2011 DOI
  • Pål Løvhaugen, Balpreet Singh Ahluwalia, Thomas Rolf Huser, Peter Anthony Mccourt, Olav Gaute Hellesø :
    Optical trapping forces on biological cells on a waveguide surface
    Proceedings of SPIE, the International Society for Optical Engineering 2011 DOI
  • Balpreet Singh Ahluwalia, Olav Gaute Hellesø, Ananth Z. Subramanian, N. M. B. Perney, N. P. Sessions, James S. Wilkinson :
    Fabrication and optimization of Tantalum pentoxide waveguides for optical micro-propulsion
    SPIE - The International Society for Optics and Photonics 2010 DATA
  • Balpreet Singh Ahluwalia, Olav Gaute Hellesø, Ananth Z. Subramanian, James S. Wilkinson, Jie Chen, Xuyuan Chen :
    Integrated platform based on high refractive index contrast waveguide for optical guiding and sorting
    Proceedings of SPIE, the International Society for Optical Engineering 2010 OMTALE / DATA / SAMMENDRAG / DOI
  • Balpreet Singh Ahluwalia, Peter Anthony Mccourt, Thomas Rolf Huser, Olav Gaute Hellesø :
    Optical trapping and propulsion of red blood cells on waveguide surfaces
    Optics Express 2010 ARKIV
  • Pål Løvhaugen, Balpreet Singh Ahluwalia, Thomas Rolf Huser, Peter Anthony McCourt, Olav Gaute Hellesø :
    Optical trapping forces on biological cells on a waveguide surface
    SPIE - The International Society for Optics and Photonics 2011 SAMMENDRAG
  • Mathias Novik Jensen, Olav Gaute Hellesø :
    Raman characterisation of UV-written silica waveguides
    2022
  • Mathias Novik Jensen, Benjamin Ricaud, Olav Gaute Hellesø :
    De-noising and differentiation of low-SNR Raman-spectra of EV's
    2022
  • Md Rabiul Hasan, Olav Gaute Hellesø :
    Trapping of biological nanoparticles by quasi-bound state in the continuum
    2022
  • Marek Vlk, Md Rabiul Hasan, Mathias Novik Jensen, Olav Gaute Hellesø :
    Optical Metasurfaces and Waveguide Chips for Trapping and Raman Spectroscopy
    2022
  • Md Rabiul Hasan, Marek Vlk, Olav Gaute Hellesø :
    Simulation of trapping by quasi-bound state in the continuum
    2022
  • Marek Vlk, Md Rabiul Hasan, Olav Gaute Hellesø :
    Dielectric metasurface for optical trapping of nanoparticles
    2022
  • Øystein Ivar Helle, Firehun Tsige Dullo, Marcel Lahrberg, Jean-Claude Tinguely, Olav Gaute Hellesø, Balpreet Singh Ahluwalia :
    Photonic chip-based optical nanoscopy
    2021
  • Jana Jágerská, Firehun Tsige Dullo, Susan M. Lindecrantz, Jacqueline Boergers, Jørn H Hansen, Laura Gomez Lechuga et al.:
    Cryptophane-Cladded Interferometric Waveguide Sensor for Aqueous Methane Detection
    2017
  • Mukesh Yadav, Jana Jágerská, Jørn H Hansen, Olav Gaute Hellesø :
    Sensitivity and response time of an on-chip methane sensor
    2017
  • Jana Jágerská, Firehun Tsige Dullo, Martin Ingvaldsen, Susan M. Lindecrantz, Magnus Engqvist, Jørn H Hansen et al.:
    On-Chip Methane Sensing with Cryptophane-A Cladded Waveguide Interferometers
    2016
  • Jana Jágerská, Firehun Tsige Dullo, Martin Ingvaldsen, Susan M. Lindecrantz, Jørn H Hansen, Stian Solbø et al.:
    On-chip methane sensing with a cryptophane-A cladded Mach-Zehnder interferometer
    2016
  • Jana Jágerská, Firehun Tsige Dullo, Martin Ingvaldsen, Susan M. Lindecrantz, Magnus Engqvist, Jørn H Hansen et al.:
    On-chip methane sensors based on cryptophane-A cladded waveguide interferometers
    2016
  • Martin Ingvaldsen, Jana Jágerská, Firehun Tsige Dullo, Susan M. Lindecrantz, Magnus Engqvist, Jørn H Hansen et al.:
    Cryptophane-A doped polymers for methane sensing
    2016
  • Firehun Tsige Dullo, Susan Lindecrantz, Olav Gaute Hellesø, Stian Solbø :
    Optical Waveguide Interferometer for Measuring Methane Concentration
    2013
  • Susan Lindecrantz, Olav Gaute Hellesø :
    Analysis of Homogeneous Sensitivity of Rib-waveguides of Mach-Zehnder Interferometer
    2012
  • Susan Lindecrantz, Olav Gaute Hellesø :
    Design of waveguide Mach-Zehnder Interferometer sensor for subsea detection of methane
    2011
  • Bjarne J. Husabø, Balpreet Singh Ahluwalia, Olav Gaute Hellesø :
    Q-factor of high refractive index glass microspheres in air and water
    2009
  • Olav Gaute Hellesø :
    MicroMove: Flytting, karakterisering og sorteringav mikro- og nanopartiklar med lys
    2009
  • Olav Gaute Hellesø :
    MicroMove: Moving, characterising and sorting micro- and nanoparticles with light
    2009

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    Research interests

    The research is focused on optical waveguides for trapping and sensing.

    Waveguides can be used to trap, propel and detect nano- and microparticles. We have demonstrated that the waveguides can be used to squeeze red blood cells, which can be used to measure their elasticity. The elasticity of red blood cells is very important for their functions in the body and the measured elasticity was related to how long the cells had been stored. Regarding trapping of microparticles, a small gap (2um) in a waveguide loop can tightly trap a microparticle, while a wider gap (10um) can be used to levitate a particle above the surface of the chip. When a microparticle is trapped on a waveguide Mach-Zehnder interferometer, it induces a measureable phase change, which can be related to the size of the trapped particle.

    Waveguides can be used to make highly sensitive interferometers. In order to detect methane, we cover the waveguide (sensing arm) by a polymer (SAN) doped with a cage-shaped molecule (cryptophane-A). Methane diffuses into the polymer and is trapped in the cage-molecule. This gives a change in the refractive index of the polymer, which gives a phase-change for the evanescent field of the guided mode. This is detected by the interferometer and can be related to the concentration of methane. We have used this method to measure the methane concentration down to 6 ppm.

    Teaching

    Teaching FYS-1003 Experimental physics, FYS-2008 Measurement techniques and FYS-3009 Photonics


    Member of research group