Blar i 1 USN ansatte på forfatter "Øhlckers, Per"

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    • A Clover shaped silicon piezoresistive microphone for miniaturized photoacoustic gas sensors 

      Grinde, Christopher; Øhlckers, Per; Mielnik, M.; Jensen, Geir Uri; Wang, DT (Chapter, 2009)
      Here we present the design and modeling of a novel piezoresistive microphone designed for a photoacoustic gas sensor system. The microphone is fabricated using a novel process to enable DRIE etch through of membranes of ...

    • Bipolar photodiode module operated at 4 K 

      Bardalen, Eivind; Nissilä, Jaani; Fordell, Thomas; Karlsen, Bjørnar; Kieler, Oliver; Øhlckers, Per (Chapter, 2020)
      An optoelectronic module for generating high frequency bipolar current pulses at 4 K was developed. Bipolar signals are generated by connecting a pair of photodiodes in series to coplanar waveguides on silicon. The ...

    • Characterization of high-precision resistive voltage divider and buffer amplifier for ac voltage metrology 

      Karlsen, Bjørnar; Lind, Kåre; Malmbekk, Helge; Øhlckers, Per (Peer reviewed; Journal article, 2019)
      A high-precision voltage buffer and a 10:1 resistive voltage divider have been constructed for use in ac voltage and electrical power metrology. Long-term stability of the buffer's dc response has been demonstrated by two ...

    • DRIE Si Nanowire Arrays Supported Nano-Carbon Film for Deriving High Specific Energy Supercapacitors On-Chip 

      Lu, Pai; Chen, Xuyuan; Øhlckers, Per; Halvorsen, Einar; Hoffmann, Martin; Müller, Lutz (Peer reviewed; Journal article, 2021)
      Supercapacitor is a promising solution to storage of pulsed energy generated by MEMS energy harvesting systems, relying on its faster charging/discharging capability than secondary battery. To improve the energy density ...

    • Driving a low critical current Josephson junction array with a mode-locked laser 

      Nissilä, J.; Fordell, Thomas; Kohopää, K.; Mykkänen, E.; Immonen, P.; Jabdaraghi, R. N.; Bardalen, Eivind; Kieler, Oliver; Karlsen, Bjørnar; Øhlckers, Per; Behr, Ralf; Manninen, A. J.; Govenius, J.; Kemppinen, A. (Peer reviewed; Journal article, 2021)
      We report proof-of-concept experiments on an optically driven Josephson voltage standard based on a mode-locked laser (MLL), a time-division multiplexer, and a cryogenic ultrafast photodiode driving an overdamped Josephson ...

    • ELAB's kateter-tupp blodtrykksmåler - bruksområde og egenskaper 

      Øhlckers, Per (Master thesis, 1974)
      Formålet med oppgaven var å undersøke bruksegenskapene til ELAB's kateter-tupp blodtrykksmåler. En generell utredning om intravaskulær blodtrykksmåling slik den anvendes idag ble foretatt ved litteraturstudie og direkte ...

    • Electronic components, packaging and production 

      Halbo, Leif; Øhlckers, Per (Book, 1995)
      The present book is primarily meant for university education in introductory electronic packaging technology. We attempt to give an overview that encompasses aspects of material technology, metallurgy, chemistry, physical ...

    • Evaluation of Silicon Diaphragms for Hermetic Packaging of Microbolometer Arrays 

      Xia, Hexin; Akram, Muhammad Nadeem; Bardalen, Eivind; Roy, Avisek; Aasmundtveit, Knut; Øhlckers, Per (Chapter, 2020)
      Hermetic packaging is a critical requirement for microbolometers to maintain long-term reliability. A thinner diaphragm is desirable for vacuum packaging of microbolometers to obtain higher infrared light transmission. ...

    • High-Speed Pulsation of a Cryogenically Operable Bipolar Photodiode Module for the Josephson Arbitrary Waveform Synthesizer 

      Karlsen, Bjørnar; Bardalen, Eivind; Nissilä, Jaani; Fordell, Thomas; Kieler, Oliver; Palafox, Luis; Behr, Ralf; Malmbekk, Helge; Akram, Muhammad Nadeem; Øhlckers, Per (Peer reviewed; Journal article, 2020)
      This paper describes the development and testing of a prototype of a cryogenically operable bipolar photodiode module. Optical pulsation systems based on both a Mach-Zehnder modulator and a mode-locked laser have been used ...

    • On-chip supercapacitor electrode based on polypyrrole deposited into nanoporous Au scaffold 

      Lu, Pai; Øhlckers, Per; Chen, Xuyuan (Journal article; Peer reviewed, 2016)
      On-chip supercapacitors hold the potential promise for serving as the energy storage units in integrated circuit system, due to their much higher energy density in comparison with conventional dielectric capacitors, high ...

    • Porous Thin-Wall Hollow Co3O4 Spheres for Supercapacitors with High Rate Capability 

      Fan, Xiao; Sun, Yongjiao; Øhlckers, Per; Chen, Xuyuan (Peer reviewed; Journal article, 2019)
      In this study, a zeolitic imidazolate framework-67 (ZIF-67) was prepared as a precursor using a facile hydrothermal method. After a calcination reaction in the air, the as-prepared precursor was converted to porous thin-wall ...

    • Simulated effects of wet-etched induced surface roughness on IR transmission and reflection 

      Papatzacos, Phillip; Akram, Muhammad Nadeem; Bardalen, Eivind; Øhlckers, Per (Chapter, 2020)
      We have constructed a finite element simulation where we investigate the effects of wet-etch-induced surface roughness on transmission and reflection of infrared light in the 8-12um band. A silicon wafer was wet-etched for ...

    • Tunable synthesis of hollow Co3O4 nanoboxes and their application in supercapacitors 

      Fan, Xiao; Øhlckers, Per; Chen, Xuyuan (Peer reviewed; Journal article, 2020)
      Hollow Co3O4 nanoboxes constructed by numerous nanoparticles were prepared by using a facile method consisting of precipitation, solvothermal and annealing reactions. The desirable hollow structure as well as a highly ...