• Characterization and polarization resolved simulation of diffractive optical elements 

      Bouquet, Grégory; Johansen, Ib-Rune (Lecture, 2008)
      We present our activity on the characterization and simulation of diffractive optical elements (DOEs) for near infrared spectroscopy. The DOE surface is designed to direct and focus light of a limited set of wavelengths ...
    • Detection of single nano-defects in photonic crystals between crossed polarizers 

      Grepstad, Jon Olav; Kaspar, Peter; Johansen, Ib-Rune; Solgaard, Olav; Sudbø, Aasmund (Journal article, 2013)
      We investigate, by simulations and experiments, the light scattering of small particles trapped in photonic crystal membranes supporting guided resonance modes. Our results show that, due to amplified Rayleigh small particle ...
    • Fabrication of an array of silicon microscales for the monitoring of chemical processes 

      Lacolle, Matthieu Jean P; Johansen, Ib-Rune; Wang, Dag Thorstein; Moe, Sigurd T.; Sagberg, Håkon; Clausen, Sigmund; Karlsson, Arne; Akporiaye, Duncan (Journal article; Peer reviewed, 2012)
      We present the fabrication and demonstration of a two-dimensional array of scales micromachined in silicon. Each scale consists of a platform suspended by a spring. The mass present on the platform of each scale is measured ...
    • Finite-size limitations on quality factor of guided resonance modes in 2D photonic crystals 

      Grepstad, Jon Olav; Greve, Martin Møller; Holst, Bodil; Johansen, Ib-Rune; Solgaard, Olav; Sudbø, Aasmund (Journal article, 2013)
      High-Q guided resonance modes in two-dimensional photonic crystals, enable high field intensity in small volumes that can be exploited to realize high performance sensors. We show through simulations and experiments how ...
    • Microfluidic chip based detection of cervical cancer 

      Furuberg, Liv; Mielnik, Michal Marek; Johansen, Ib-Rune; Borch, Morten; Stenstad, Per Martin (Lecture, 2009)
    • Optical MEMS filter for infrared gas detection 

      Bakke, Thor; Lacolle, Matthieu Jean P; Sagberg, Håkon; Johansen, Ib-Rune; Moe, Sigurd T. (Lecture, 2008)
      An optical filter is proposed, which can be adapted to infrared detection of various gases. The filter is based on a diffraction grating structured on a micro-electro-mechanical system (MEMS) which can be switched between ...
    • Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application 

      Grepstad, Jon Olav; Kaspar, Peter; Solgaard, Olav; Johansen, Ib-Rune; Sudbø, Aasmund (Journal article, 2012)
      A sensor designed to detect bio-molecules is presented. The sensor exploits a planar 2D photonic crystal (PC) membrane with sub-micron thickness and through holes, to induce high optical fields that allow detection of ...
    • Two-state Optical Filter Based on Micromechanical Diffractive Elements 

      Sagberg, Håkon; Bakke, Thor; Johansen, Ib-Rune; Lacolle, Matthieu Jean P; Moe, Sigurd T. (Chapter, 2007)
      We have designed a robust two-state filter for infrared gas measurement, where the filter transmittance alternates between a single bandpass function, and a double-band offset reference. The device consists of fixed and ...
    • Wood's anomalies and spectral uniformity of focusing diffractive optical elements 

      Angelskår, Hallvard; Johansen, Ib-Rune; Lacolle, Matthieu Jean P; Sudbø, Aasmund Sveinung (Journal article, 2010)
      We report on simulations and measurements of focusing diffractive optical elements, fabricated as two-level binary optics. The diffractive optical elements are designed to separate and focus four specific wavelengths in ...