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Olav Gaute Hellesø

Professor / Ultralyd, mikrobølger og optikk
Institutt for fysikk og teknologi




Forskningsinteresser

  • Fotonikk
  • Mikro- og nanoteknologi
  • Integrert optikk og fanging av mikro- og nanopartiklar

Undervisning

Underviser i kursa FYS-1003 Eksperimentell fysikk, FYS-2008 Måleteknikk og FYS-3009 Fotonikk.

Arbeider i CRIStin


  • Hellesø, Olav Gaute. Optical pressure and numerical simulation of optical forces. Applied Optics 2017; Volum 56 (12). ISSN 1559-128X.s 3354 - 3358.s doi: 10.1364/AO.56.003354.

  • Dullo, Firehun Tsige; Ingvaldsen, Martin; Jágerská, Jana; Jacobsen, Svein Ketil; Hellesø, Olav Gaute. Temperature Sensitivity of a Waveguide Young Interferometer. IEEE Photonics Technology Letters 2016; Volum 28 (11). ISSN 1041-1135.s 1205 - 1208.s doi: 10.1109/LPT.2016.2523064.

  • Ahluwalia, Balpreet Singh; Helle, Øystein Ivar; Hellesø, Olav Gaute. Rib waveguides for trapping and transport of particles. Optics Express 2016; Volum 24 (5). ISSN 1094-4087.s 4477 - 4487.s doi: 10.1364/OE.24.004477.

  • Dullo, Firehun Tsige; Tinguely, Jean-Claude; Solbø, Stian; Hellesø, Olav Gaute. Single-mode limit and bending losses for shallow Rib Si3N4 waveguides. IEEE Photonics Journal 2015; Volum 7 (1). ISSN 1943-0655.s doi: 10.1109/JPHOT.2014.2387252.

  • Ahluwalia, Balpreet Singh; McCourt, Peter Anthony; Oteiza, Ana; Wilkinson, James S.; Huser, Thomas Rolf; Hellesø, Olav Gaute. Squeezing red blood cells on an optical waveguide to monitor cell deformability during blood storage. The Analyst 2015; Volum 140 (1). ISSN 0003-2654.s 223 - 229.s doi: 10.1039/c4an01181c.

  • Helle, Øystein Ivar; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Optical transport, lifting and trapping of micro-particles by planar waveguides. Optics Express 2015; Volum 23 (15). ISSN 1094-4087.s 6601 - 6612.s doi: 10.1364/OE.23.006601.

  • Lindecrantz, Susan Mariah; Tinguely, Jean-Claude; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Characterization of a waveguide Mach-Zehnder interferometer using PDMS as a cover layer. Journal of the European Optical Society - Rapid Publications 2015; Volum 10 (15020). ISSN 1990-2573.s 1 - 7.s doi: 10.2971/jeos.2015.15020.

  • Dullo, Firehun Tsige; Hellesø, Olav Gaute. On-chip phase measurement for microparticles trapped on a waveguide. Lab on a Chip 2015; Volum 15 (19). ISSN 1473-0197.s 3918 - 3924.s doi: 10.1039/c5lc00794a.

  • Dullo, Firehun Tsige; Lindecrantz, Susan; Jagerska, Jana; Hansen, Jørn H; Engqvist, Stig Olov Magnus; Solbø, Stian; Hellesø, Olav Gaute. Sensitive on-chip methane detection with a cryptophane-A cladded Mach-Zehnder interferometer. (data) Optics Express 2015; Volum 23. ISSN 1094-4087.s 331564 - 31573.s doi: 10.1364/OE.23.031564.

  • Lindecrantz, Susan; Hellesø, Olav Gaute. Estimation of propagation losses for narrow strip and rib waveguides. IEEE Photonics Technology Letters 2014; Volum 26 (18). ISSN 1041-1135.s 1836 - 1839.s doi: 10.1109/LPT.2014.2337055.

  • Tinguely, Jean-Claude; Ding, Ming; Brambilla, Gilberto; Hohenau, A; Krenn, J. R.; Hellesø, Olav Gaute. Nanostructured fibre tip for trapping of nanoparticles. Proceedings of SPIE, the International Society for Optical Engineering 2014; Volum 8999. ISSN 0277-786X.s doi: 10.1117/12.2037240.

  • Dullo, Firehun Tsige; Sokolov, Viktor; Cyprien, Chauvet; Lindecrantz, Susan; Solbø, Stian; Hellesø, Olav Gaute. Temperature sensitivity of waveguide Mach-Zehnder interferometer. Proceedings of SPIE, the International Society for Optical Engineering 2014; Volum 8988:T. ISSN 0277-786X.s doi: 10.1117/12.2039556.

  • Ahluwalia, Balpreet Singh; McCourt, Peter Anthony; Wilkinson, James S.; Huser, Thomas; Hellesø, Olav Gaute. Optical deformation of red blood cells trapped on a narrow waveguide. SPIE - International Society for Optical Engineering 2014 ISBN 9781628411911.s doi: 10.1117/12.2062590.

  • Ahluwalia, Balpreet Singh; Brox, Petter; Helle, Øystein Ivar; Tinguely, Jean-Claude; Hellesø, Olav Gaute. Near-field waveguide trapping and tracking of particles using fluorescence imaging. SPIE - International Society for Optical Engineering 2014 ISBN 9780819499127.s doi: 10.1117/12.2039235.

  • Lindecrantz, Susan; Dullo, Firehun Tsige; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Sensitivity of Mach-Zehnder interferometer for dissolved gas monitoring. SPIE - International Society for Optical Engineering 2014 ISBN 9780819499011.s doi: 10.1117/12.2039431.

  • Ahluwalia, Balpreet Singh; McCourt, Peter Anthony; Oteiza, Ana; Wilkinson, James S.; Huser, Thomas Rolf; Hellesø, Olav Gaute. Squeezing red blood cells with the evanescent field of an optical waveguide to monitor cell deformability during blood storage. The Analyst 2014; Volum 140. ISSN 0003-2654.s 223 - 229.s doi: 10.1039/C4AN01181C.

  • Løvhaugen, Pål; Ahluwalia, Balpreet Singh; Huser, Thomas Rolf; Hellesø, Olav Gaute. Serial Raman spectroscopy of particles trapped on a waveguide. Optics Express 2013; Volum 21 (3). ISSN 1094-4087.s 2964 - 2970.s doi: 10.1364/OE.21.002964.

  • Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Optical waveguide loop for planar trapping of blood cells and microspheres. Proceedings of SPIE, the International Society for Optical Engineering 2013; Volum 8810 (12). ISSN 0277-786X.s doi: 10.1117/12.2023945.

  • Hellesø, Olav Gaute; Løvhaugen, Pål; Subramanian, Ananth Z.; Wilkinson, James S.; Ahluwalia, Balpreet Singh. Surface transport and stable trapping of particles and cells by an optical waveguide loop. Lab on a Chip 2012; Volum 12 (18). ISSN 1473-0197.s 3436 - 3440.s doi: 10.1039/c2lc40375g.

  • Ahluwalia, Balpreet Singh; Løvhaugen, Pål; Hellesø, Olav Gaute. Waveguide trapping of hollow glass spheres. Optics Letters 2011; Volum 36 (17). ISSN 0146-9592.s 3347 - 3349.s doi: 10.1364/OL.36.003347.

  • Løvhaugen, Pål; Ahluwalia, Balpreet Singh; Huser, Thomas Rolf; Mccourt, Peter Anthony; Hellesø, Olav Gaute. Optical trapping forces on biological cells on a waveguide surface. Proceedings of SPIE, the International Society for Optical Engineering 2011; Volum 7902. ISSN 0277-786X.s doi: 10.1117/12.873779.

  • Løvhaugen, Pål; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Optical waveguide trapping forces on hollow glass spheres. Proceedings of SPIE, the International Society for Optical Engineering 2011; Volum 7950. ISSN 0277-786X.s doi: 10.1117/12.873772.

  • Ahluwalia, Balpreet Singh; Mccourt, Peter Anthony; Huser, Thomas Rolf; Hellesø, Olav Gaute. Optical trapping and propulsion of red blood cells on waveguide surfaces. Optics Express 2010; Volum 18 (20). ISSN 1094-4087.s 21053 - 21061.

  • Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute; Subramanian, Ananth Z.; Wilkinson, James S.; Chen, Jie; Chen, Xuyuan. Integrated platform based on high refractive index contrast waveguide for optical guiding and sorting. (data) (omtale) (sammendrag) Proceedings of SPIE, the International Society for Optical Engineering 2010 (7613). ISSN 0277-786X.s 1 - 8.s doi: 10.1117/12.840632.

  • Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute; Subramanian, Ananth Z.; Perney, N. M. B.; Sessions, N. P.; Wilkinson, James S.. Fabrication and optimization of Tantalum pentoxide waveguides for optical micro-propulsion. (data) SPIE - International Society for Optical Engineering 2010 ISBN 9780819480002.

  • Ahluwalia, Balpreet Singh; Subramanian, A. Z.; Hellesø, Olav Gaute; Perney, N. M. B.; Sessions, N. P.; Wilkinson, J. S.. Fabrication of Submicrometer High Refractive Index Tantalum Pentoxide Waveguides for Optical Propulsion of Microparticles. IEEE Photonics Technology Letters 2009; Volum 21 (19). ISSN 1041-1135.s 1408 - 1410.s doi: 10.1109/LPT.2009.2027025.

  • Néel, D.; Gétin, S.; Ferret, P.; Rosina, M.; Fedeli, J. M.; Hellesø, Olav Gaute. Optical transport of semiconductor nanowires on silicon nitride waveguides. Applied Physics Letters 2009; Volum 94 (25). ISSN 0003-6951.s doi: 10.1063/1.3148778.

  • Grujic, Katarina; Hellesø, Olav Gaute. Dielectric microsphere manipulation and chain assembly by counter-propagating waves in a channel waveguide. Optics Express 2007; Volum 15 (10). ISSN 1094-4087.s 6470 - 6477.

  • Grujic, Katarina; Hole, John Patrick; Hellesø, Olav Gaute; Wilkinson, James S.. Whispering gallery mode excitation in borosilicate glass microspheres by K+ ion-exchanged channel waveguide coupler. SPIE - International Society for Optical Engineering 2006 (6101) ISBN 9780819461438. ISSN 0277-786X.

  • Hellesø, Olav Gaute; Grujic, Katarina; Hole, John Patrick; Jaising, Hitesh Y; Wilkinson, James S.. Manipulation of microparticles with integrated optics. SPIE - International Society for Optical Engineering 2006 (6123) ISBN 9780819461650. ISSN 0277-786X.

  • Jaising, Hitesh Y; Grujic, Katarina; Hellesø, Olav Gaute. Simulations and velocity measurements for a microparticle in an evanescent field. Optical Review 2005; Volum 12. ISSN 1340-6000.

  • Grujic, Katarina; Hellesø, Olav Gaute; Hole, JP; Wilkinson, JS. Sorting of polystyrene microspheres using a Y-branched optical waveguide. Optics Express 2005; Volum 13 (1). ISSN 1094-4087.s 1 - 7.

  • Jaising, Hitesh Y; Hellesø, Olav Gaute. Radiation forces on a Mie particle in the evanescent field of an optical waveguide. Optics Communications 2005; Volum 246. ISSN 0030-4018.

  • Hole, JP; Wilkinson, JS; Grujic, Katarina; Hellesø, Olav Gaute. Velocity distribution of Gold nanoparticles trapped on an optical waveguide. Optics Express 2005; Volum 13. ISSN 1094-4087.s 3896 - 3901.

  • Grujic, Katarina; Hellesø, Olav Gaute; Wilkinson, JS; Hole, JP. Optical propulsion of microspheres along a channel waveguide produced by Cs+ ion-exchange in glass. Optics Communications 2004; Volum 239. ISSN 0030-4018.s 227 - 235.

  • Chen, Xuyuan; Pedersen, A.; Hellesø, Olav Gaute; Van Rheenen, Arthur D.. Electrical noise of laser diodes measured over a wide range of bias-currents. Microelectronics and reliability 2000; Volum 40. ISSN 0026-2714.s 1925 - 1928.

  • Hellesø, Olav Gaute. Michelson interferometer and reference mirrors integrated on glass. Measurement science and technology 1995 (6). ISSN 0957-0233.s 1362 - 1367.

  • Hellesø, Olav Gaute. Interferometric displacement sensor made by integrated optics on glass. Sensors and Actuators A-Physical 1995; Volum 47 (1-3). ISSN 0924-4247.s 478 - 481.

  • Hellesø, Olav Gaute. Propagation losses in poassium ion-exchanged waveguide with superstrate. Applied Optics 1995; Volum 34 (33). ISSN 0003-6935.s 7702 - 7704.

  • Hellesø, Olav Gaute. Low loss S-bends in K+ ion-exchanged waveguides. IEEE Photonics Technology Letters 1994; Volum 6 (10). ISSN 1041-1135.s 1241 - 1243.

  • Hellesø, Olav Gaute. Displacement sensor made by potassium diffusion on glass. Journal of Lightwave Technology 1994; Volum 12 (3). ISSN 0733-8724.s 568 - 572.

  • Hellesø, Olav Gaute. Single-mode potassium and silver ion-exchanged glass waveguides with low losses and high index increase. Applied Physics Letters 1992; Volum 61 (23). ISSN 0003-6951.s 2759 - 2760.

  • Hellesø, Olav Gaute. Diode laser butt coupling to K+ diffused waveguides in glass. IEEE Photonics Technology Letters 1992; Volum 4 (8). ISSN 1041-1135.s 900 - 902.

  • Løvhaugen, Pål; Ahluwalia, Balpreet Singh; Huser, Thomas Rolf; McCourt, Peter Anthony; Hellesø, Olav Gaute. Optical trapping forces on biological cells on a waveguide surface. (sammendrag) SPIE - International Society for Optical Engineering 2011 ISBN 9780819484390.

  • Yadav, Mukesh; Jágerská, Jana; Hansen, Jørn H; Hellesø, Olav Gaute. Sensitivity and response time of an on-chip methane sensor. The European Conference on Lasers and Electro-Optics (CLEO Europe) 2017-06-25 - 2017-06-29 2017.

  • Jágerská, Jana; Dullo, Firehun Tsige; Lindecrantz, Susan M.; Boergers, Jacqueline; Hansen, Jørn H; Lechuga, Laura Gomez; Hellesø, Olav Gaute. Cryptophane-Cladded Interferometric Waveguide Sensor for Aqueous Methane Detection. CLEO: Applications and Technology 2017-05-14 - 2017-05-19 2017.

  • Jágerská, Jana; Dullo, Firehun Tsige; Ingvaldsen, Martin; Lindecrantz, Susan M.; Hansen, Jørn H; Solbø, Stian; Hellesø, Olav Gaute. On-chip methane sensing with a cryptophane-A cladded Mach-Zehnder interferometer. Field Laser Applications in Industry and Research 2016 2016-09-12 - 2016-09-16 2016.

  • Jágerská, Jana; Dullo, Firehun Tsige; Ingvaldsen, Martin; Lindecrantz, Susan M.; Engqvist, Magnus; Hansen, Jørn H; Solbø, Stian; Hellesø, Olav Gaute. On-chip methane sensors based on cryptophane-A cladded waveguide interferometers. Norwegian electro-optics meeting 2016 2016-04-13 - 2016-04-15 2016.

  • Ingvaldsen, Martin; Jágerská, Jana; Dullo, Firehun Tsige; Lindecrantz, Susan M.; Engqvist, Magnus; Hansen, Jørn H; Solbø, Stian; Hellesø, Olav Gaute. Cryptophane-A doped polymers for methane sensing. Norwegian electro-optics meeting 2016 2016-04-13 - 2016-04-15 2016.

  • Jágerská, Jana; Dullo, Firehun Tsige; Ingvaldsen, Martin; Lindecrantz, Susan M.; Engqvist, Magnus; Hansen, Jørn H; Hellesø, Olav Gaute. On-Chip Methane Sensing with Cryptophane-A Cladded Waveguide Interferometers. CLEO: Science and Innovations 2016-06-05 - 2016-06-10 2016.

  • Dullo, Firehun Tsige; Lindecrantz, Susan; Hellesø, Olav Gaute; Solbø, Stian. Optical Waveguide Interferometer for Measuring Methane Concentration. Optoelectronics Technologies for oil and gas industry 2013-06-06 - 2013.

  • Lindecrantz, Susan; Hellesø, Olav Gaute. Analysis of Homogeneous Sensitivity of Rib-waveguides of Mach-Zehnder Interferometer. Proceedings of the 16th European Conference on Integrated Optics (ECIO) & The 20th International Workshop on Optical Waveguide Theory and Numerical l Modelling 2012-04-18 - 2012-04-21 2012.

  • Lindecrantz, Susan; Hellesø, Olav Gaute. Design of waveguide Mach-Zehnder Interferometer sensor for subsea detection of methane. Optoelectronic Technologies for the Oil and Gas Industry 2011-11-27 - 2011-11-27 2011.

  • Hellesø, Olav Gaute. MicroMove: Flytting, karakterisering og sorteringav mikro- og nanopartiklar med lys. Fredagsforedrag ved IFT, Univ. i Bergen 2009-05-08 - 2009.

  • Husabø, Bjarne J.; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute. Q-factor of high refractive index glass microspheres in air and water. Northern Optics 2009 2009-08-26 - 2009-08-28 2009.

  • Hellesø, Olav Gaute. MicroMove: Moving, characterising and sorting micro- and nanoparticles with light. Gjesteforelesing ved IET, NTNU 2009-11-19 - 2009.

  • Grujic, Katarina; Hellesø, Olav Gaute. Assembly of microsphere chains by counterpropagating, guided waves. European Conference on Integrated Optics 2007-04-25 - 2007-04-27 2007.

  • Hellesø, Olav Gaute. Urbane Tromsø søkjer sosiale sivilingeniørar. Nordlys 2007. ISSN 0805-5440.

  • Wilkinson, James S.; Hole, John Patrick; Grujic, Katarina; Hellesø, Olav Gaute. Propulsion and Sorting of Gold Nanospheres on Optical Waveguides. International Conference on Optics-photonics Design & Fabrication 2006-12-06 - 2006-12-08 2006.

  • Grujic, Katarina; Hole, John Patrick; Hellesø, Olav Gaute; Wilkinson, James S.. Morphology dependent resonances for a microparticle optically trapped on the surface of a waveguide. Northern Optics 2006-06-14 - 2006-06-16 2006.

  • Wilkinson, James S.; Hellesø, Olav Gaute; Hole, John Patrick; Grujic, Katarina. Optical Waveguide Manipulation of Micro- and Nanospheres. Progress in Electromagnetics Research Symposium 2006-03-26 - 2006-03-29 2006.

  • Grujic, Katarina; Hole, John Patrick; Hellesø, Olav Gaute; Wilkinson, James S.. Whispering gallery modes excitation in borosilicate glass microspheres by K+ ion-exchanged channel waveguide coupler. Photonics West 2006-01-21 - 2006-01-26 2006.

  • Hellesø, Olav Gaute; Grujic, Katarina; Hole, John Patrick; Jaising, Hitesh Y; Wilkinson, James S.. Manipulation of microparticles with integrated optics. Photonics West 2006-01-21 - 2006-01-26 2006.

  • Blad, Jakob; Hadzialic, Sanja; Solgaard, Olav; Sudbø, Aasmund Sveinung; Grujic, Katarina; Wilkinson, JS; Hellesø, Olav Gaute; Hole, JP. Nanostrukturar for optikk. Nanoteknologi - nye muligheter for norsk industri 2006-06-08 - 2006-06-08 2006.

  • Grujic, Katarina; Hellesø, Olav Gaute. Microsphere chain formation in the evanescent field of an optical waveguide. European Conference on Integrated Optics (ECIO) 2005-04-06 - 2005-04-08 2005.

  • Hellesø, Olav Gaute; Hanssen, Alfred; Fredriksen, Åshild. NSB-tog i Tromsø. Fra Fysikkens Verden 2005 (3). ISSN 0015-9247.s 71 - 73.

  • Grujic, Katarina; Hellesø, Olav Gaute. Guiding and Sorting of Micro- and Nano-Particles with Integrated Optics. CLEO/Europe 2005-06-12 - 2005-06-17 2005.

  • Hellesø, Olav Gaute; Grujic, Katarina. Manipulation of microspheres in the evanescent field of an optical waveguide. Fysikermøtet 2005-08-11 - 2005-08-14 2005.

  • Jaising, Hitesh Y; Grujic, Katarina; Hellesø, Olav Gaute. Simulations and velocity measurements for a microparticle in an evanescent field. 2004 ICO International Conference on Optics & Photonics in Technology Frontier 2004-07-12 - 2004-07-15 2004.

  • Grujic, Katarina; Hellesø, Olav Gaute. Guiding of polystyrene and glass microspheres along Cs+ ion-exchanged waveguides. The Norwegian Electro-optics meeting 2004 2004-05-02 - 2004-05-04 2004.

  • Hellesø, Olav Gaute. Bruk av lys til å manipulera, detektera og sortera mikro- og nanopartiklar. Internt seminar, Mat.nat.-fak, UiTø 2003-11-21 - 2003.

  • Jaising, Hitesh Y; Grujic, Katarina; Hellesø, Olav Gaute. Integrated Optics Structures for Trapping and Manipulation of Small Particles. Norwegian Electooptics Meeting 2002-01-01 - 2002-01-01 2001.

  • Grujic, Katarina; Jaising, Hitesh Y; Hellesø, Olav Gaute. Optimising Waveguide Structure for the Purpose of Particle Trapping. Norwegian Electro-Optics Meeting 2002-01-01 - 2002-01-01 2001.

  • Chen, Xuyuan; Pedersen, A.; Hellesø, Olav Gaute; Van Rheenen, Arthur D.. Electrical noise of laser diodes measured over a wide range of bias-currents. 15th Inter. Conf. on Noise in Phys. Systems and 1/¦ Fluctuations 1999-01-01 - 1999-01-01 1999.

  • Hellesø, Olav Gaute. Interferometric displacement sensor integrated on glass. Optical Fiber Sensors - 9 1993-05-04 - 1993-05-06 1993.

  • Medlem i forskergruppe