News & Updates


Schottky Prize for Kaiqiang Lin


Kekulé's nightmare - snakes and ladders


Negative-mass electrons in WSe2


Triplet quenching reported in Science


Twinkle, twinkle little star - counting single molecules

Follow the construction of our RUN building

Professor John Lupton

Faculty of Physics
University of Regensburg
Universitaetsstrasse 31
93053 Regensburg

Secretary: +49 941 943-2081
Fax: +49 941 943-4226

Email: john.lupton(at)

Utah Website

Research Interests

Our research involves the use of subensemble techniques – single-molecule spectroscopy, magnetic resonance, and ultrafast fluorescence – to investigate the role of nanoscale order and shape on charge and energy migration in pi-conjugated macromolecules, semiconductor nanocrystals, and metallic nanoparticles.

The overarching theme, condensed in the term “molecular mesoscopics”, is to identify collective optoelectronic phenomena which arise out of the superposition of characteristics of individual building blocks. For example, nanoparticles or polymer molecules may couple to each other over large distances, leading to highly local nano-optic phenomena which arise from electronic delocalization on length scales which are orders of magnitude larger. The activities require the development of new sensitive spectroscopies along with collaborations with synthetic groups to develop custom-defined molecular building blocks with specific functionality.

Curriculum Vitae

1997 B.Sc. in Physics from Durham University (UK); Award of Henry Walters Prize and Chalmers Prize in Experimental Physics
1997 CERN Summer student
1999 DAAD Research Fellow, University of Marburg (Prof. H. Bässler)
2000 Visiting Scientist, University of Rochester, NY (Prof. S. Mukamel)
2000 Ph. D. in Physics, University of Durham (Prof. I. Samuel)
2000 Research Fellow, University of St. Andrews (Prof. I. Samuel)
2001 Project group leader, Max Planck Institute for Polymer Research, Mainz (Prof. G. Wegner)
2002 University Assistant, Photonics and Optoelectronics Group, University of Munich
2005 Offer of a W2/C3 Professorship (University of Kiel) as well as a Professorship (University of Utah)
2006 Associate Professor of Physics, University of Utah
2006 Award of the Max Auwärter Prize through the Austrian Physical Society
2008 Award of the David & Lucile Packard Foundation Fellowship for Science and Engineering
2010 RCSA Scialog award
2010 Full Professor of Physics and Astronomy, University of Utah
2010 Professor of Physics (Chair), University of Regensburg
2011 Research Professor of Physics and Astronomy, University of Utah
2012 ERC Starting Grant
2015 Offer of a Chair in Physical Chemistry, University of Cologne (declined)
2015 Dean, Department of Physics, Regensburg

Selected Publications

  • Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs (with R. P. Puchert, F. Steiner, G. Plechinger, F. Hofmann, I. Caspers, J. Kirschner, P. Nagler, A. Chernikov, C. Schüller, T. Korn, J. Vogelsang, S. Bange)
    Nature Nano. 12, 637 (2017)
  • Mesoscopic quantum emitters from deterministic aggregates of conjugated polymers (with T. Stangl, P. Wilhelm, K. Remmerssen, S. Höger, J. Vogelsang)
    PNAS 112, E5560 (2015)
  • The spin-Dicke effect in OLED magnetoresistance (with D. P. Waters, G. Joshi, M. Kavand, M. E. Limes, H. Malissa, P. L. Burn, C. Boehme)
    Nature Phys. 11, 910 (2015)
  • Room-temperature coupling between electrical currents and nuclear spins in OLEDs (with H. Malissa, M. Kavand, D. P. Waters, K. J. van Schooten, P. L. Burn, Z. V. Vardeny, B. Saam, C. Boehme)
    Science 345, 1487 (2014)
  • Fluctuating exciton localisation in giant pi-conjugated spoked-wheel macrocycles (with V. Aggarwal, A. Thiessen, A. Idelson, D. Kalle, D. Würsch, T. Stangl, F. Steiner, S.-S. Jester, J. Vogelsang, S. Höger)
    Nature Chem. 5, 964 (2013)
  • Unraveling the chromophoric disorder of poly(3-hexylthiophene) (with A. Thiessen, J. Vogelsang, T. Adachi, F. Steiner, D. Vanden Bout)
    PNAS 110, E3550 (2013)
  • Metal-free OLED triplet emitters by side-stepping Kasha's rule (with D. Chaudhuri, E. Sigmund, A. Meyer, L. Röck, P. Klemm, S. Lautenschlager, A. Schmid, S. R. Yost, T. Van Voorhis, S. Bange, S. Höger)
    Angew. Chem. Int. Ed. 52, 13449 (2013)
  • Robust absolute magnetometry with organic thin-film devices (with W.J. Baker, K. Ambal, D. P. Waters, R. Baarda, H. Morishita, K. van Schooten, D.R. McCamey, C. Boehme)
    Nature Comm. 3, 898 (2012)
  • The role of particle morphology in interfacial energy transfer in CdSe/CdS heterostructure nanocrystals (with N. J. Borys, M. J. Walter, J. Huang, D. V. Talapin)
    Science 330, 1371 (2010)
  • Unraveling the inhomogeneously broadened absorption spectrum of conjugated polymers by single-molecule light-harvesting action spectroscopy (with M. J. Walter)
    Phys. Rev. Lett. 103, 167401 (2009)
  • Spin Rabi flopping in the photocurrent of a polymer light-emitting diode (with D. R. McCamey, H. A. Seipel, S. Y. Paik, M. J. Walter, N. J. Borys, C. Boehme)
    Nature Mat. 7, 723 (2008)
  • Laser Technology: Over the Rainbow
    Nature 453, 459 (2008)
  • Room-temperature exciton storage in elongated semiconductor nanocrystals (with R. M. Kraus, P. G. Lagoudakis, A. L. Rogach, D. V. Talapin, H. Weller, J. Feldmann)
    Phys. Rev. Lett. 98, 017401 (2007)
  • Electrical control of Förster energy transfer (with K. Becker, J. Müller, D. V. Talapin, A. L. Rogach, H. Weller, J. Feldmann)
    Nature Mat. 5, 777 (2006)
  • How single conjugated polymer molecules respond to electric fields (with F. Schindler, J. Müller, J. Feldmann, U. Scherf)
    Nature Mat. 5, 141 (2006)
  • Spin-conserving carrier recombination in conjugated polymers (with M. Reufer, M. J. Walter, P. G. Lagoudakis, A. B. Hummel, J. S. Kolb, H. G. Roskos, U. Scherf)
    Nature Mat. 4, 340 (2005)
  • A universal picture of chromophores in pi-conjugated polymers derived from single molecule spectroscopy (with F. Schindler, J. Feldmann, U. Scherf)
    PNAS 101, 14695 (2004)