Browsing SINTEF Open by Author "Gjessing, Jo"
Now showing items 1-5 of 5
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Dynamic piezoelectric MEMS-based optical metasurfaces
Meng, Chao; Thrane, Paul Conrad Vaagen; Ding, Fei; Gjessing, Jo; Thomaschewski, Martin; Wu, Cuo; Dirdal, Christopher Andrew; Bozhevolnyi, Sergey (Peer reviewed; Journal article, 2021)Optical metasurfaces (OMSs) have shown unprecedented capabilities for versatile wavefront manipulations at the subwavelength scale. However, most well-established OMSs are static, featuring well-defined optical responses ... -
High-quality dense 3D point clouds with active stereo and a miniaturizable interferometric pattern projector
Thorstensen, Jostein Bruun; Thielemann, Jens T; Risholm, Petter; Gjessing, Jo; Dahl-Hansen, Runar Plunnecke; Tschudi, Jon (Peer reviewed; Journal article, 2021)We have built and characterized a compact, simple and flexible 3D camera based on interferometric fringe projection and stereo reconstruction. The camera uses multi-frame active stereo as basis for 3D reconstruction, ... -
MEMS-tunable dielectric metasurface lens using thin-film PZT for large displacements at low voltages
Dirdal, Christopher Andrew; Thrane, Paul Conrad Vaagen; Dullo, Firehun Tsige; Gjessing, Jo; Summanwar, Anand; Tschudi, Jon (Peer reviewed; Journal article, 2022)Tunable focusing is a desired property in a wide range of optical imaging and sensing technologies but has tended to require bulky components that cannot be integrated on-chip and have slow actuation speeds. Recently, ... -
Reliable Pb(Zr,Ti)O3-based thin film piezoelectric micromirrors for space-applications
Dahl-Hansen, Runar Plunnecke; Gjessing, Jo; Mardilovich, Peter; Fragkiadakis, Charalampos; Thorstensen, Jostein Bruun (Peer reviewed; Journal article, 2022)Although Pb(Zr,Ti)O3 (PZT) piezoelectric thin films are finding widespread applications on Earth, it is yet unclear if they are suitable for space-related applications. In space, their long-term reliability is a significant ... -
Towards high-throughput large-area metalens fabrication using UV-nanoimprint lithography and Bosch deep reactive ion etching
Dirdal, Christopher Andrew; Jensen, Geir Uri; Angelskår, Hallvard; Thrane, Paul Conrad Vaagen; Gjessing, Jo; Ordnung, Daniel Alfred (Peer reviewed; Journal article, 2020)We demonstrate the fabrication of diffraction-limited dielectric metasurface lenses for NIR by the use of standard industrial high-throughput silicon processing techniques: UV nano imprint lithography (UV-NIL) combined ...