Johannes Skaar
Professor
-
Theoretical Physics

Norwegian version of this page
Mobile phone
48497352
Room
Ø373
Username
Visiting address
Sem Sælands vei 24
Fysikkbygningen
0371 OSLO
Postal address
Postboks 1048 Blindern
0316 OSLO
100 % position at the Dep. of Physics, UiO. Before 2017, at NTNU.
Research
Quantum optics, electromagnetics, metamaterials, photonics, quantum information.
Teaching
- Fall 2020: FYS3110 Quantum mechanics
- Spring 2021: FYS1001 Introduction to physics
Publications
- Hågenvik, Hans Olaf & Skaar, Johannes (2019). Magnetic permeability in Fresnel’s equation. Journal of the Optical Society of America. B, Optical physics. ISSN 0740-3224. 36(5), s 1386- 1395 . doi: 10.1364/JOSAB.36.001386 Full text in Research Archive.
- Skaar, Johannes (2019). Fresnel's equations in statics and quasistatics. European Journal of Physics. ISSN 0143-0807. 40(4) . doi: 10.1088/1361-6404/ab166b Full text in Research Archive.
- Skaar, Johannes; Hågenvik, Hans Olaf & Dirdal, Christopher Andrew (2019). Four definitions of magnetic permeability for periodic metamaterials. Physical review B (PRB). ISSN 2469-9950. 99(6) . doi: 10.1103/PhysRevB.99.064407 Full text in Research Archive. Show summary
- Dirdal, Christopher Andrew; Hågenvik, Hans Olaf; Haave, Haakon Aamodt & Skaar, Johannes (2018). Higher order multipoles in metamaterial homogenization. IEEE Transactions on Antennas and Propagation. ISSN 0018-926X. 66(11), s 6403- 6407 . doi: 10.1109/TAP.2018.2863742 Full text in Research Archive. Show summary
- Dirdal, Christopher Andrew & Skaar, Johannes (2018). Diamagnetism and the dispersion of the magnetic permeability. European Physical Journal B : Condensed Matter Physics. ISSN 1434-6028. 91(6) . doi: 10.1140/epjb/e2018-80515-1 Full text in Research Archive.
- Joshi, Siddarth Koduru; Pienaar, Jacques; Ralph, Timothy C.; Cacciapuoti, Luigi; McCutcheon, Will; Rarity, John; Giggenbach, Dirk; Lim, Jin Gyu; Makarov, Vadim; Fuentes, Ivette; Scheidl, Thomas; Beckert, Erik; Bourennane, Mohamed; Bruschi, David Edward; Cabello, Adán; Capmany, Jose; Carrasco-Casado, Alberto; Diamanti, Eleni; Dušek, Miloslav; Elser, Dominique; Gulinatti, Angelo; Hadfield, Robert H.; Jennewein, Thomas; Kaltenbaek, Rainer; Krainak, Michael A.; Lo, Hoi-Kwong; Marquardt, Christoph; Milburn, Gerard; Peev, Momtchil; Poppe, Andreas; Pruneri, Valerio; Renner, Renato; Salomon, Christophe; Skaar, Johannes; Solomos, Nikolaos; Stipčević, Mario; Torres, Juan P.; Toyoshima, Morio; Villoresi, Paolo; Walmsley, Ian; Weihs, Gregor; Weinfurter, Harald; Zeilinger, Anton; Żukowski, Marek & Ursin, Rupert (2018). Space QUEST mission proposal: experimentally testing decoherence due to gravity. New Journal of Physics. ISSN 1367-2630. 20:063016(6), s 1- 22 . doi: 10.1088/1367-2630/aac58b Full text in Research Archive.
- Hågenvik, Hans Olaf; Bløtekjær, Kjell & Skaar, Johannes (2017). Dielectric media considered as vacuum with sources. American Journal of Physics (AJP). ISSN 0002-9505. 85(11), s 830- 833 . doi: 10.1119/1.5003810 Full text in Research Archive.
- Marøy, Øystein; Makarov, Vadim & Skaar, Johannes (2017). Secure detection in quantum key distribution by real-time calibration of receiver. Quantum Science and Technology. ISSN 2058-9565. 2(4) . doi: 10.1088/2058-9565/aa83c9 Full text in Research Archive.
- Dirdal, Christopher Andrew; Bondevik, Tarjei & Skaar, Johannes (2015). Relaxed dispersion constraints and metamaterial effective parameters with physical meaning for all frequencies. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 91(13) . doi: 10.1103/PhysRevB.91.134102
- Dirdal, Christopher Andrew & Skaar, Johannes (2015). Superposing Lorentzian resonance functions towards engineering target responses, In Said Zouhdi; Nikolay Zheludev & Jing Hua Teng (ed.), Meta'14 Singapore Proceedings. META conference. ISBN 978-2-9545460-4-9. Artikkel. s 53 - 58
- Hågenvik, Hans Olaf; Malema, Markus Edward & Skaar, Johannes (2015). Fourier theory of linear gain media. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). ISSN 1050-2947. 91(4) . doi: 10.1103/PhysRevA.91.043826
- Hågenvik, Hans Olaf & Skaar, Johannes (2015). Fourier-Laplace analysis and instabilities of a gainy slab. Journal of the Optical Society of America. B, Optical physics. ISSN 0740-3224. 32(9), s 1947- 1953 . doi: 10.1364/JOSAB.32.001947
- Svendsen, Guro Kristin; Skaar, Johannes; Weman, Helge & Dupertuis, Marc-André (2015). Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 92(20) . doi: 10.1103/PhysRevB.92.205303
- Bugge, Audun Nystad; Sauge, Sebastien; Ghazali, Aina Mardhiyah M.; Skaar, Johannes; Lydersen, Lars Vincent Van de Wiel & Makarov, Vadim (2014). Laser damage helps the eavesdropper in quantum cryptography. Physical Review Letters. ISSN 0031-9007. 112(7:070503) . doi: 10.1103/PhysRevLett.112.070503
- Liu, Qin; Lamas-Linares, Antia; Kurtsiefer, Christian; Skaar, Johannes; Makarov, Vadim & Gerhardt, Ilja (2014). A universal setup for active control of a single-photon detector. Review of Scientific Instruments. ISSN 0034-6748. 85(1) . doi: 10.1063/1.4854615
- Marøy, Øystein; Gudmundsen, Magne; Lydersen, Lars Vincent Van de Wiel & Skaar, Johannes (2014). Error estimation, error correction and verification in quantum key distribution. IET Information Security. ISSN 1751-8709. 8(5), s 277- 282 . doi: 10.1049/iet-ifs.2012.0333
- Dirdal, Christopher Andrew & Skaar, Johannes (2013). Negative refraction in causal media by evaluating polar paths for rational functions. Journal of the Optical Society of America. B, Optical physics. ISSN 0740-3224. 30(2), s 370- 376 . doi: 10.1364/JOSAB.30.000370
- Dirdal, Christopher Andrew & Skaar, Johannes (2013). Superpositions of Lorentzians as the class of causal functions. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). ISSN 1050-2947. 88(3) . doi: 10.1103/PhysRevA.88.033834
- Svendsen, Guro Kristin; Haakestad, Magnus Willum & Skaar, Johannes (2013). Reciprocity and the scattering matrix of waveguide modes. Physical Review A. Atomic, Molecular, and Optical Physics (PRA). ISSN 1050-2947. 87(1) . doi: 10.1103/PhysRevA.87.013838
- Skaar, Johannes & Haakestad, Magnus Willum (2012). Inverse scattering of dispersive stratified structures. Journal of the Optical Society of America. B, Optical physics. ISSN 0740-3224. 29(9), s 2438- 2445 . doi: 10.1364/JOSAB.29.002438 Show summary
- Svendsen, Guro Kristin; Weman, Helge & Skaar, Johannes (2012). Investigations of Bragg reflectors in nanowire lasers. Journal of Applied Physics. ISSN 0021-8979. 111(12) . doi: 10.1063/1.4729529
- Andresen, Marte Pernille Hatlo; Krogstad, Harald E & Skaar, Johannes (2011). Inverse scattering of two-dimensional photonic structures by layer stripping. Journal of the Optical Society of America. B, Optical physics. ISSN 0740-3224. 28(4), s 689- 696 . doi: 10.1364/josab.28.000689
- Gerhardt, Ilja; Liu, Qin; Lamas-linares, Antia; Skaar, Johannes; Kurtsiefer, Christian & Makarov, Vadim (2011). Full-field implementation of a perfect eavesdropper on a quantum cryptography system. Nature Communications. ISSN 2041-1723. 2(349) . doi: 10.1038/ncomms1348 Full text in Research Archive. Show summary
- Gerhardt, Ilja; Liu, Qin; Lamas-linares, Antia; Skaar, Johannes; Scarani, Valerio; Makarov, Vadim & Kurtsiefer, Christian (2011). Experimentally faking the violation of Bell’s inequalities. Physical Review Letters. ISSN 0031-9007. 107(170404) . doi: 10.1103/PhysRevLett.107.170404 Show summary
- Grepstad, Jon Olav & Skaar, Johannes (2011). Does evanescent gain exist?, In W. Ross Stone (ed.), Proceedings of the XXXth URSI General Assembly in Istanbul (August 2011). IEEE conference proceedings. ISBN 978-1-4244-5117-3. Artikkel.
- Grepstad, Jon Olav & Skaar, Johannes (2011). Total internal reflection and evanescent gain. Optics Express. ISSN 1094-4087. 19(22), s 21404- 21418 . doi: 10.1364/OE.19.021404 Full text in Research Archive.
- Nilsen, Fabian Skalleberg & Skaar, Johannes (2020, 24. februar). Østlandssendingen - er det mulig å forsyne seg selv med strøm ved hjelp av spinningsykler og tredemøller?. [Radio]. NRK P1.
- Fedorov, Aleksey; Gerhardt, Ilja; Huang, Anqi; Jogenfors, Jonathan; Kurochkin, Yury; Lamas-Linares, Antia; Larsson, Jan-Åke; Leuchs, Gerd; Lydersen, Lars Vincent Van de Wiel; Makarov, Vadim & Skaar, Johannes (2019). Comment on 'Inherent security of phase coding quantum key distribution systems against detector blinding attacks' (2018 Laser Phys. Lett. 15 095203). Laser Physics Letters. ISSN 1612-2011. 16 . doi: 10.1088/1612-202X/aaf22d
- Hågenvik, Hans Olaf & Skaar, Johannes (2019). Analysis of active and passive metamaterials.
- Jemterud, Torkild; Skaar, Johannes; Eidsvoll, David & Iqbal, Yasmin Sofia (2019, 01. november). Abels tårn. [Radio]. NRK P2.
- Risan, Lars & Skaar, Johannes (2019). SENT-kveld på Teknisk museum: Foredrag om kvantedatamaskiner.
- Skaar, Johannes (2019, 28. oktober). Intervju av TV2 Nyhetskanalen, kl 0710, om kvantedatamaskiner. [TV]. TV2 Nyhetskanalen.
- Skaar, Johannes (2019). Musikk og matematikk.
- Dirdal, Christopher Andrew; Hågenvik, Hans Olaf; Haave, Haakon Aamodt & Skaar, Johannes (2018). Higher order multipoles in metamaterial homogenization.
- Skaar, Johannes (2018). Energi - uten en tråd.
- Skaar, Johannes (2018). Fysikk og musikk.
- Skaar, Johannes (2018). Matematikk i musikk.
- Andersen, Elise Rønnevig; Bratberg, Øivind; Hellum, Mari Kjos; Hjelle, Ole Petter; Hussein, Bassam; Lie, Anne Helene Kveim; McNicol, John; Raklev, Are; Selboe, Tone; Skaar, Johannes & Stensaker, Inger G. (2017, 31. august). Landets beste forelesere svarer: Slik studerer du mest effektivt. Aftenposten.
- Klingenberg, Mathias & Skaar, Johannes (2017, 13. februar). 100 milliarder bilder i sekundet fanger lys som går raskere enn seg selv. [Fagblad]. Teknisk ukeblad.
- Mauren, Arnfinn & Skaar, Johannes (2017, 01. januar). Magisk teknologi kan bety farvel til hacking. [Fagblad]. Aftenposten Vitenskap.
- Opheim, Aagot & Skaar, Johannes (2017, 11. januar). Vil gi ære, status og høyere lønn til de beste underviserne. Adresseavisen.
- Sande, Anniken & Skaar, Johannes (2017, 27. januar). Her og nå: Dagens gjest. [Radio]. NRK P1.
- Skaar, Johannes (2017). Musikkens fysikk.
- Skaar, Johannes & Tollersrud, Emma (2017, 20. januar). Med lønnsøkning skal underviserne skinne. Morgenbladet.
- Stensvold, Tore & Skaar, Johannes (2017, 13. oktober). Norwegian Tech Awards 2017 - WÄRTSILÄ. De lader ferge med 1,2 megawatt effekt - uten fysisk kontakt med fartøyet. [Fagblad]. Teknisk ukeblad.
- Sund, Steinar & Skaar, Johannes (2017, 27. september). Snart kan du lade med klærne. [Tidsskrift]. Aftenposten Vitenskap.
- Sævik, Bjørnar Torvholm; Folven, Erik; Jahre, Magnus & Skaar, Johannes (2017, 24. februar). Ein æra er omm. [Internett]. nrk.no.
- Bakken, Kjersti & Skaar, Johannes (2016, 20. september). Norgesglasset: "Lærer man egentlig noe av forelesninger, eller trenger studentene noe helt annet for å bli flinke?". [Radio]. NRK P1.
- Dirdal, Christopher Andrew; Hågenvik, Hans Olaf & Skaar, Johannes (2016). Higher order terms and origin dependence in metamaterial homogenization.
- Dirdal, Christopher Andrew; Hågenvik, Hans Olaf & Skaar, Johannes (2016). Permittivity, permeability, and the significance of the electrical quadrupole in metamaterials.
- Hågenvik, Hans Olaf; Dirdal, Christopher Andrew & Skaar, Johannes (2016). Homogenization of metamaterials: comparison and analysis.
- Indregard, Sigve & Skaar, Johannes (2016, 25. november). Til Mars med mikrobølgeovn. Morgenbladet.
- Kleiven, David; Skjønsfjell, Eirik Torbjørn Bakken; Zontone, Federico; Chushkin, Yuriy; Skaar, Johannes & Breiby, Dag Werner (2016). Experimental and Numerical Studies for Improved Coherent Diffraction Phase Retrieval.
- Skaar, Johannes (2016). Kortforedrag om musikk og fysikk.
- Skaar, Johannes (2016). Magneter, metallrør og usynlighetskapper.
- Tollersrud, Emma & Skaar, Johannes (2016, 02. september). «Hvis vi ikke underviser, er det lett å ta elementære ting for gitt.». Morgenbladet.
- Dirdal, Christopher Andrew & Skaar, Johannes (2015). Giving Freedom and Physical Meaning to the Effective Parameters of Metamaterials for all Frequencies.
- Hågenvik, Hans Olaf & Skaar, Johannes (2015). Laplace-Fourier analysis and instabilities of an active slab.
- Jegtvik, Karin & Skaar, Johannes (2015, 02. april). Er du vinneren av påskefjellet?. [Internett]. nrk.no.
- Ramsdal, Roar & Skaar, Johannes (2015, 18. mars). Her sendes 10 kilowatt trådløst. [Internett]. Teknisk ukeblad.
- Skaar, Johannes (2015). Hva er lys?.
- Skaar, Johannes (2015). Maxwells teori og Hertz' eksperiment – grunnlaget for moderne telekommunikasjon ble skapt for 150 år siden.
- Andreassen, Katrine; Skaar, Johannes; Løland, Anders & Rolén, Tage (2014, 11. februar). Finn ut om du er en sinke på ski. [Internett]. klikk.no.
- Brandslet, Steinar; Skaar, Johannes; Løland, Anders & Rolén, Tage (2014). Hvor fort går du på ski?. Aftenposten (morgenutg. : trykt utg.). ISSN 0804-3116.
- Børringbo, Klaus & Skaar, Johannes (2014, 29. september). Trådløs strøm – snart er den her. Aftenposten.
- Dalløkken, Per Erlien; Skaar, Johannes & Samset, Bjørn Hallvard (2014, 01. juli). «Metamaterialer» skal beskytte piloter mot laserangrep fra bakken. [Internett]. Teknisk ukeblad.
- Dirdal, Christopher Andrew & Skaar, Johannes (2014). Metamaterial responses beyond the Kramers-Kronig relations.
- Dirdal, Christopher Andrew & Skaar, Johannes (2014). Superposing Lorentzian functions towards engineering target responses. The 5th International Conference on Metamaterials, Photonic Crystals and Plasmonics Book of Abstracts.
- Dirdal, Christopher Andrew & Skaar, Johannes (2014). Superposing Lorentzian functions towards engineering target responses.
- Iversen, Marita Løvmo; Jansrud, Line & Skaar, Johannes (2014, 27. april). Går det an å gjøre noe usynlig? NRK Newton. [TV]. NRK 1.
- Schirber, Michael; Bugge, Audun Nystad; Sauge, Sebastien; Ghazali, Aina; Skaar, Johannes; Lydersen, Lars Vincent Van de Wiel & Makarov, Vadim (2014, 18. februar). Synopsis: Cyberattack by Breaking and Entering. [Internett]. APS Physics.
- Svendsen, Guro Kristin; Skaar, Johannes; Weman, Helge & Dupertuis, M.-A. (2014). Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires.
- Brandslet, Steinar; Skaar, Johannes; Løland, Anders & Rolén, Tage (2013, 12. desember). Hvor fort går du på ski?. [Internett]. forsking.no.
- Brandslet, Steinar; Skaar, Johannes; Løland, Anders & Rolén, Tage (2013). Hvor fort går du på ski?. Gemini. ISSN 0802-085X. (2), s 6- 7
- Flæten, Sigurd Øygarden & Skaar, Johannes (2013, 05. desember). Laser kan bli fremtidens spionkamera. [Internett]. Teknisk ukeblad.
- Haugen, Vegard & Skaar, Johannes (2013). Døde av elektrosjokk med iPhone 5 i hånden. VG-Nett.
- Haugen, Vegard & Skaar, Johannes (2013, 15. juli). Døde av elektrosjokk med iPhone 5 i hånden. [Internett]. amobil.no.
- Lydersen, Lars Vincent Van de Wiel & Skaar, Johannes (2013). Kvantekryptografi. Fra Fysikkens Verden. ISSN 0015-9247. 75(1), s 10
- Moe, Enok & Skaar, Johannes (2013). Rockheim forstyrrer flytrafikken på Værnes. Adresseavisen. ISSN 0805-3804.
- Skaar, Johannes; Løland, Anders; Rolén, Tage & Kokkegård, Hanne (2013, 26. desember). Vild med tal? Tæl dig frem til, om du er hurtigst. [Internett]. dr.dk.
- Bugge, Audun Nystad; Sauge, Sebastien; Ghazali, Aina; Skaar, Johannes; Lydersen, Lars Vincent Van de Wiel & Makarov, Vadim (2012). Laser damage of photodiodes helps the eavesdropper.
- Grepstad, Jon Olav; Kaspar, Peter; Johansen, Ib-Rune; Skaar, Johannes; Sudbø, Aasmund & Solgaard, Olav (2012). Optical detection of single biomolecules using photonic-crystal membranes.
- Time, Jon Kåre & Skaar, Johannes (2012, 13. september). I bakvendtland der alt går an. Morgenbladet.
- Time, Jon Kåre & Skaar, Johannes (2012, 06. september). Trollmannen fra Tyrifjord. Morgenbladet.
- Christensen, Arnfinn & Skaar, Johannes (2011, 27. mai). Strøm uten støpsel. [Internett]. forskning.no.
- Giæver, Ole Peder; Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 16. august). Norske forskere knekte koden. [Internett]. ABC nyheter.
- Grepstad, Jon Olav; Due-Hansen, Jon; Johansen, Ib-Rune; Borch, Morten; Kaspar, Peter; Furuberg, Liv; Skaar, Johannes; Sudbø, Aasmund Sveinung & Solgaard, Olav (2011). Umiddelbar diagnose i 2020.
- Grepstad, Jon Olav; Kaspar, Peter; Due-Hansen, Jon; Johansen, Ib-Rune; Borch, Morten; Furuberg, Liv; Skaar, Johannes; Sudbø, Aasmund Sveinung & Solgaard, Olav (2011). System for optical characterization of photonic crystal membranes - designed for biological sensing with single molecule sensitivity.
- Grepstad, Jon Olav & Skaar, Johannes (2011). Does evanescent gain exist?.
- Jemterud, Torkild & Skaar, Johannes (2011, 04. januar). Verdt å vite: Usynlighetskapper. [Radio]. NRK P2.
- Lee, Chris; Makarov, Vadim; Liu, Qin & Skaar, Johannes (2011, 15. november). Researchers show how to break quantum cryptography by faking quantum entanglement. [Internett]. Ars Technica.
- Liu, Qin; Gerhardt, Ilja; Makarov, Vadim; Skaar, Johannes; Lamas-linares, Antia; Scarani, Valerio & Kurtsiefer, Christian (2011). Implementation of an attack scheme on a practical QKD system.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 23. juni). Eavesdropper Steals Quantum Crypto Keys. [Internett]. InformationWeek.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 01. august). Eavesdropper demonstrates loophole in secure communications. [Internett]. Photonics Spectra.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 18. juni). First Exploit On Quantum Cryptography Confirmed. [Internett]. Slashdot.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 16. juni). Gjør kvantekryptografi enda sikrere. [Internett]. digi.no.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 19. juni). Hackers pioneros rompen criptosistema cuántico. [Internett]. ALT1040.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 17. juni). Hackers steal quantum code. [Internett]. Physics World.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 14. juni). Kryptografia kwantowa jest nie do złamania?. [Internett]. Gazeta.pl.
- Liu, Qin; Makarov, Vadim & Skaar, Johannes (2011, 20. juni). Quantum crypto felled by 'Perfect Eavesdropper' exploit. [Internett]. The Register.
Published Sep. 3, 2019 8:21 AM
- Last modified Oct. 18, 2020 8:03 AM