title: Lasing in Bose-Fermi mixtures.
abstract: Light amplification by stimulated emission of radiation, well-known for revolutionising photonic science, has been realised primarily in fermionic systems including widely applied diode lasers. The prerequisite for fermionic lasing is the inversion of electronic population, which governs the lasing threshold. More recently, bosonic lasers have also been developed based on Bose-Einstein condensates of exciton-polaritons in semiconductor microcavities. These electrically neutral bosons coexist with charged electrons and holes. In the presence of magnetic fields, the charged particles are bound to their cyclotron orbits, while the neutral exciton-polaritons move freely. We demonstrate how magnetic fields affect dramatically the phase diagram of mixed Bose-Fermi systems, switching between fermionic lasing, incoherent emission and bosonic lasing regimes in planar and pillar microcavities with optical and electrical pumping. We collected and analyzed the data taken on pillar and planar microcavity structures at continuous wave and pulsed optical excitation as well as injecting electrons and holes electronically. Our results evidence the transition from a Bose gas to a Fermi liquid mediated by magnetic fields and light-matter coupling.
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Vladimir P
authors.initials: VP
authors.lastname: Kochereshko
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Mikhail V
authors.initials: MV
authors.lastname: Durnev
authors.affiliation: Institut Néel, CNRS/UJF 25, avenue des Martyrs - BP 166, Fr-38042 Grenoble Cedex 9, France.
authors.forename: Lucien
authors.initials: L
authors.lastname: Besombes
authors.affiliation: Institut Néel, CNRS/UJF 25, avenue des Martyrs - BP 166, Fr-38042 Grenoble Cedex 9, France.
authors.forename: Henri
authors.initials: H
authors.lastname: Mariette
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Victor F
authors.initials: VF
authors.lastname: Sapega
authors.affiliation: Faculty of Physical Sciences and Engineering, University of Southampton, Highfield, Southampton, SO171BJ, UK.
authors.forename: Alexis
authors.initials: A
authors.lastname: Askitopoulos
authors.affiliation: Science Institute, University of Iceland, Dunhagi-3, IS-107, Reykjavik, Iceland.|Department of Applied Physics/COMP, Aalto University, PO Box 14100, 00076 Aalto, Finland.
authors.forename: Ivan G
authors.initials: IG
authors.lastname: Savenko
authors.affiliation: Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore.
authors.forename: Timothy C H
authors.initials: TC
authors.lastname: Liew
authors.affiliation: Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore.
authors.forename: Ivan A
authors.initials: IA
authors.lastname: Shelykh
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Platonov
authors.affiliation: IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete, Greece.
authors.forename: Simeon I
authors.initials: SI
authors.lastname: Tsintzos
authors.affiliation: IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete, Greece.
authors.forename: Z
authors.initials: Z
authors.lastname: Hatzopoulos
authors.affiliation: Department of Materials Science &Technology, University of Crete, Greece.|IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete, Greece.
authors.forename: Pavlos G
authors.initials: PG
authors.lastname: Savvidis
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Vladimir K
authors.initials: VK
authors.lastname: Kalevich
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Mikhail M
authors.initials: MM
authors.lastname: Afanasiev
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26, Politechnicheskaya, 194021, St-Petersburg, Russia.
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Lukoshkin
authors.affiliation: Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Schneider
authors.affiliation: Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Amthor
authors.affiliation: Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Metzger
authors.affiliation: Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Kamp
authors.affiliation: Technische Physik and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany.|SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom.
authors.forename: Sven
authors.initials: S
authors.lastname: Hoefling
authors.affiliation: Faculty of Physical Sciences and Engineering, University of Southampton, Highfield, Southampton, SO171BJ, UK.
authors.forename: Pavlos
authors.initials: P
authors.lastname: Lagoudakis
authors.affiliation: Spin Optics Laboratory, Saint-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia.|Faculty of Physical Sciences and Engineering, University of Southampton, Highfield, Southampton, SO171BJ, UK.
authors.forename: Alexey
authors.initials: A
authors.lastname: Kavokin
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