News & Updates


Photon Antibunching from polymer aggregates. See article in PNAS


Ever wondered about the ac-Zeeman effect? See article in Nature Physics


How hot are silver "hot spots"? See PRL.


Measuring the magnetic field of an individual electron spin, reported in Nature Comm.


Max Gmelch wins FameLab's Science Speak: From single molecules to Simpsons (see Mittelbayerische)

Professor John Lupton

Faculty of Physics
University of Regensburg
Universitaetsstrasse 31
93053 Regensburg

Secretary: +49 941 943-2080
Fax: +49 941 943-4226

Email: john.lupton(at)

Utah Website

Research Interests

I work in the field of organic semiconductors and am interested in the fundamental optical and electronic properties of these systems. The aim of my research is to develop new frameworks and ideas to enable the creation of truly molecular optoelectronic devices. I started my PhD working on organic light-emitting diodes (LEDs). The bulk of my work focused on the development of a new class of materials based on star-shaped molecules, called dendrimers.

Over the past decade, I have developed time and frequency-domain techniques to study subensemble properties of strongly disordered materials. A central focus of my work is single-molecule spectroscopy, cryogenic and room-temperature, of conjugated polymers. We also study semiconductor nanocrystals and metallic nanoparticle aggregates for plasmonic enhancement of the light-matter interaction. Additional work focuses on spin-dependent processes in organic semiconductors, where transient spin-resonance techniques have proven particularly useful.

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

Selected Publications

  • 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)