• 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 ...
    • Design and Fabrication of on-chip heating for Electric Substitution Radiometer 

      Jalalian Javadpour, Hamed (Master thesis, 2021)
      This thesis describes the design, simulations, and fabrication of heating resistors by the photolithography process, and finally integration of a selected resistor through a bonding procedure to the backside of a ...
    • 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 ...
    • 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 Performance Predictable Quantum Efficient Detector Based on Induced-Junction Photodiodes Passivated with SiO2/SiNx 

      Koybasi, Ozhan; Nordseth, Ørnulf; Tran, Trinh; Povoli, Marco; Rajteri, Mauro; Pepe, Carlo; Bardalen, Eivind; Manoocheri, Farshid; Summanwar, Anand; Korpusenko, Mikhail; Getz, Michael Norderhaug; Ohlckers, Per; Ikonen, Erkki; Gran, Jarle (Peer reviewed; Journal article, 2021)
      We performed a systematic study involving simulation and experimental techniques to develop induced-junction silicon photodetectors passivated with thermally grown SiO2 and plasma-enhanced chemical vapor deposited (PECVD) ...
    • 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 ...
    • Reliable Packaging and Development of Photodiode Module for Operation at 4 K 

      Bardalen, Eivind (Doctoral dissertations at the University of South-Eastern Norway;5, Doctoral thesis, 2018)
      AC voltage standards based on pulse-driven Josephson junction arrays, operated at 4 K, enable quantum-accurate generation of arbitrary voltage waveforms. These devices are operated by biasing the arrays with high-frequency ...
    • 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 ...