Dr Stavros Christopoulos

Meet our Research Faculty

Dr Stavros Christopoulos Dr Stavros Christopoulos
Associate Professor of Physics
Sciences and Engineering
Sorbonne University Abu Dhabi
s.christopoulos@sorbonne.ae

Research Interests

  • Atomic, molecular and optical Physics: Laser cooling and spectroscopy of ultradense gases
  • Solid State Physics: Polariton lasing / Polaritonics
  • Material Physics: Nanostructured optical films

PhD in
  • Physics, specialisation in Quantum Optics
Research Collaborations

  • University of Bonn, Institut for Applied Physics (IAP) on: Laser cooling of ultradense gases
  • Cyprus University of Technology (CUT) and University of Cyprus on: Controlling the properties of oxide-based, nano-structured, composite films by using unary and multi-component particle formations

Publications

  • S. Christopoulos, N. C. Angastiniotis, V. Laux - Le Guyon, E. Bsaibess, L. Koutsokeras, B. Duponchel, J. El-Rifai., L. Li, A. Slimani. Comparative study of the optical behavior of a polyethylene film embedded with pure and mixed nanoparticles of granulated and free-standing nature. Polymers, 14(13), 2629, 2022
  • N. C. Angastiniotis, S. Christopoulos, K. C. Petallidou, A. M. Efstathiou, A. Othonos, L. Koutsokeras. Controlling the optical properties of nanostructured oxide-based polymer films. Scientific Reports, 11, 16009, 2021
  • S. Christopoulos, P. Moroshkin, L. Weller, B. Gerwers, R. Forge, T. Ockenfels, F. Vewinger, M. Weitz. Rubidium spectroscopy at high-pressure buffer gas conditions: Detailed balance in the optical interaction of an absorber coupled to a reservoir. Physica Scripta, 93, 124006, 2018
  • S. Christopoulos, D. Möller, R. Cota, B. Gerwers, M. Weitz. Verifying thermodynamic equilibrium of molecular manifolds: Kennard-Stepanov spectroscopy of a molecular gas. Physical Review A, 95:022510, 2017
  • C. Wahl, R. Brausemann, J. Schmitt, F. Vewinger, S. Christopoulos, M. Weitz. Absorption spectroscopy of xenon and ethylene–noble gas mixtures at high pressure: towards Bose–Einstein condensation of vacuum ultraviolet photons. Applied Physics B,122:296, 2016
  • S. Christopoulos, L. Weller, P. Moroshkin, D. Möller, M. Weitz, Spectroscopy and thermalisation of dense atomic gases in redistributional laser cooling, in Optical and Electronic Cooling of Solids, R. I. Epstein; D. V. Seletskiy; M. Sheik-Bahae, Editors, Proceedings of SPIE, 9765:97650H, 2016
  • S. Christopoulos, A. Saß, P. Moroshkin, L. Weller, R. Cota, B. Gerwers, K. Knicker, and M. Weitz. A Kennard-Stepanov relation study on redistributional laser cooling in dense gaseous ensembles, in Laser Refrigeration of Solids VIII, R. I. Epstein; D. V. Seletskiy; M. Sheik-Bahae, Editors, Proceedings of SPIE, 9380:93800M, 2015
  • A. Saß, R. Forge, S. Christopoulos, K. Knicker, P. Moroshkin and M. Weitz. Laser cooling of dense atomic gases by collisional redistribution of radiation and spectroscopy of molecular dimers in a dense buffer gas environment, in Laser Refrigeration of Solids VII, R. I. Epstein; D. V. Seletskiy; M. Sheik-Bahae, Editors, Proceedings of SPIE, 9000:90000A, 2014
  • J. J. Baumberg, S. Christopoulos, G. Baldassarri Höger von Högersthal, A. Grundy, P. G. Lagoudakis, A. Kavokin, G. Christmann, R. Butté, E. Feltin, J. F. Carlin, N. Grandjean, D. Solnyshkov and G. Malpuech. Room Temperature Polariton Lasing and BEC in Semiconductor Microcavities, Conference on Lasers and Electro-Optics, 2008
  • J. J. Baumberg, A. V. Kavokin, S. Christopoulos, A. J. D. Grundy, R. Butte, G.Christmann, D. D. Solnyshkov, G. Malpuech, G. Baldassarri Hoger von Hogersthal, J. F. Feltin, N. Grandjean. Spontaneous polarisation buildup in a room temperature polariton laser. Physical Review Letters, 101:136409, 2008
  • E. Feltin, G. Christmann, J. Dorsaz, A. Castiglia, J. F. Carlin, R. Butte, N. Grandjean, S. Christopoulos, G. Baldassarri Hoeger von Hogersthal, A. J. D. Grundy, P. G. Lagoudakis, J. J. Baumberg. Blue lasing at room temperature in an optically pumped lattice-matched AlInN/GaN VCSEL structure. Electronics Letters, 43:924, 2007
  • R. Butte, J. F. Carlin, E. Feltin, M. Gonschorek, S. Nicolay, G. Christmann, D. Simeonov, A. Castiglia, J. Dorsaz, H. J. Buehlmann, S. Christopoulos, G. Baldassarri Hoeger von Hoegersthal, A. J. D. Grundy, M. Mosca, C. Pinquier, M. A. Py, F. Demangeot, J. Frandon, P.G. Lagoudakis, J. J. Baumberg, N. Grandjean. Current status of AlInN layers latticematched to GaN for photonics and electronics. Journal of Physics D - Applied Physics, 40:6328, 2007
  • S. Christopoulos, G. Baldassarri Hoger von Hogersthal, A. J. D. Grundy, P. G. Lagoudakis, A. V. Kavokin, J. J. Baumberg, G. Christmann, R. Butte, E. Feltin, J. F. Carlin, N. Grandjean. Room-temperature polariton lasing in semiconductor microcavities. Physical Review Letters, 98:126405, 2007
  • D.G. Papazoglou, I. Zergioti, S. Tzortzakis, G. Sgouros, G. Maravelias, S. Christopoulos and C. Fotakis. Subpicosecond ultraviolet laser filamentation-induced bulk modifications in fused silica. Applied Physics A: Materials Science & Processing, 81:241, 2005

Book Chapters

  • A. Saß, S. Christopoulos and M. Weitz. Laser cooling of dense gases by collisional redistribution of radiation. In G. Nemova (ed.),”Laser Cooling: Fundamentals and Applications”, Jenny Stanford Publishing, October 2016

Conference Proceedings

  • SPIE, February 2016, San Francisco, USA
    Talk: Spectroscopy and thermalisation of dense atomic gases in redistributional laser cooling
  • LPHYS'15, August 2015, Shanghai, China
    Talk: Laser cooling via redistribution of fluorescence and thermalisation in dense gaseous ensembles
  • SPIE, February 2015, San Francisco, USA
    Talk: A Kennard-Stepanov relation study on redistributional laser cooling in dense gaseous ensembles
  • SPIE, February 2014, San Francisco, USA
    Talk: Laser cooling of dense atomic gases by collisional redistribution of radiation and spectroscopy of molecular dimers in a dense buffer gas environment
  • STIMSCAT Meeting, November 2008, Sheffield, UK
    Talk: Investigation of stimulated scattering of polaritons in GaN Microcavities
  • Photon08, August 2008, Edinburgh, UK
    Talk: Spontaneous symmetry breaking in an exciton-polariton Bose condensate at Room Temperature
  • E-MRS, May 2008, Strasbourg, France
    Talk: Polariton Lasing and BEC in GaN Microcavities at Room Temperature
  • PLMCN7, April 2007, Havana, Cuba
    Poster Presentation: Disentangling angular Polariton Dispersion in bulk GaN Microcavities
  • STIMSCAT Meeting, October 2006, Oxford, UK
    Talk: Room Temperature Polariton Lasing in GaN Microcavities
  • PLMCN6 September 2006, Magdeburg, Germany
    Abstract: Nonlinear Coherent Emission from Strong-Coupled GaN Microcavities at Room Temperature

Affiliations

  • Editor: American Journal of Optics and Photonics
  • Reviewer: Journal of Physics B: Atomic, Molecular and Optical Physics