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Patents:

Verfahren und Vorrichtung zur Erzeugung einer kontrollierbaren Einzelphoton-Emission, Artur Zrenner, Stefan Schumacher, Dirk Mantei, Simon Gordon, Alexander Leier; DE102012007793A1.

Journal papers:

2017

Directional optical switching and transistor functionality using optical parametric oscillation in a spinor polariton fluid 
P. Lewandowski, S. M. H. Luk, K. P. Chan, P. T. Leung, N. H. Kwong, R. Binder, and S. Schumacher 
Submitted. arXiv:1707.04925

Theory of optically controlled anisotropic polariton transport in semiconductor double microcavities 
S. M. H. Luk, P. Lewandowski, N. H. Kwong, E. Baudin, O. Lafont, J. Tignon, P. T. Leung, K. P. Chan, M. Babilon, S. Schumacher, and R. Binder
Submitted. arXiv:1705.01124

Optically controlled orbital angular momentum generation in a polaritonic quantum fluid 
S. M. H. Luk, N. H. Kwong, P. Lewandowski, S. Schumacher, and R. Binder 
Physical Review Letters 119, 113903 (2017).

Polarization-entangled twin photons from two-photon quantum-dot emission 
D. Heinze, A. Zrenner, and S. Schumacher 
Physical Review B 95, 245306 (2017).  

Vortex-vortex control in polariton condensates 
X. Ma and S. Schumacher 
Physical Review B 95, 235301 (2017).

Enhanced columnar mesophase range through distortions in arene cores
J. Vollbrecht, C. Wiebeler, S. Schumacher, H. Bock, and H. Kitzerow
Molecular crystals and liquid crystals 646, 67 (2017). 

Creation and manipulation of stable dark solitons and vortices in microcavity polariton condensates 
X. Ma, O. Egorov, and S. Schumacher 
Physical Review Letters 118, 157401 (2017).

Ultrafast electronic energy transfer in an orthogonal molecular dyad 
C. Wiebeler, F. Plasser, G. J. Hedley, A. Ruseckas, I. D. W. Samuel, and S. Schumacher
The Journal of Physical Chemistry Letters 8, 1086 (2017).

Controlling the optical spin Hall effect with light
O. Lafont, S. M. H. Luk, P. Lewandowski, N. H. Kwong, P. T. Leung, E. Galopin, A. Lemaitre, J. Tignon, S. Schumacher, E. Baudin, and R. Binder
Applied Physics Letters 110, 061108 (2017). Editor's pick.

Optical switching of polariton density patterns in a semiconductor microcavity
N. H. Kwong, C. Y. Tsang, M.H. Luk, Y.C. Tse, C. K. P. Chan, P. Lewandowski, P.T. Leung, S. Schumacher, and R. Binder
Physica Scripta 92, 034006 (2017).

2016

All-optical tailoring of single-photon spectra in a quantum-dot microcavity system
D. Breddermann, D. Heinze, R. Binder, A. Zrenner, and S. Schumacher
Physical Review B 94, 165310 (2016).

Two-dimensional symbiotic solitons and vortices in binary condensates with attractive cross-species interaction 
X. Ma, R. Driben, B. Malomed, T. Meier, and S. Schumacher
Scientific Reports 6, 34847 (2016).

Experimental realization of a polariton beam amplifier
D. Niemietz, J. Schmutzler, P. Lewandowski, M. Aßmann, S. Schumacher, K. Winkler, M. Kamp, C. Schneider, S. Höfling, and M. Bayer 
Physical Review B 93, 235301 (2016). Editor's Suggestion. Featured in Physics. 

Dynamics of exciton-polaritons in discrete lattices under incoherent localized pumping
A. V. Yulin, I. Yu Chestnov, X. Ma, S. Schumacher, U Peschel, and O. A. Egorov
Physical Review B 94, 054312 (2016).

Polarization dependence of nonlinear wave mixing of spinor polaritons in semiconductor microcavities 
P. Lewandowski, O. Lafont, E. Baudin, C. Y. Tsang, P. T. Leung, S. M. H. Luk, E. Galopin, A. Lemaitre, J. Bloch, J. Tignon, Ph. Roussignol, N. H. Kwong, R. Binder, and S. Schumacher
Physical Review B 94, 045308 (2016). 

Patterns and switching dynamics in polaritonic quantum fluids in semiconductor microcavities
N. H. Kwong, C. Y. Tsang, M.H. Luk, Y.C. Tse, P. Lewandowski, C. K. P. Chan, P.T. Leung, S. Schumacher, and R. Binder
Journal of the Optical Society of America B 33, C153 (2016). Invited.

Bay-extended, distorted perylene esters showing visible luminescence after ultraviolet excitation: photophysical and electrochemical analysis
J. Vollbrecht, C. Wiebeler, A. Neuba, H. Bock, S. Schumacher, and H. Kitzerow
Journal of Physical Chemistry C 120, 7839 (2016).

2015

A quantum dot single-photon source with on-the-fly all-optical polarization control and timed emission 
D. Heinze, D. Breddermann, A. Zrenner, and S. Schumacher 
Nature Communications 6, 8473 (2015).
Also see news articles on pro-physik.de, photonik.de, OWLJournal, and derStandard.at.

How intermolecular geometrical disorder affects the doping of donor-acceptor conjugated copolymers
D. Di Nuzzo, C. Fontanesi, R. Jones, S. Allard, U. Scherf, E. von Hauff, S. Schumacher, and E. Da Como
Nature Communications 6, 6460 (2015).
Also see news article on phys.org

Curvature effects in the band structure of carbon nanotubes including spin-orbit coupling
H. Liu, D. Heinze, H. Duc, S. Schumacher, and T. Meier
Journal of Physics: Condensed Matter 27, 445501 (2015).

A population-competition model for analyzing transverse optical patterns including optical control and structural anisotropy
Y. C. Tse, K. P. Chan, S. Luk, N. H. Kwong, P. T. Leung, R. Binder, and S. Schumacher
New Journal of Physics 17, 083054 (2015).

All-optical flow control of a polariton condensate using only non-resonant excitation
J. Schmutzler, P. Lewandowski, M. Assmann, S. Schumacher, M. Kamp, C. Schneider, S. Höfling, and M. Bayer
Physical Review B 91, 195308 (2015).

Sub-picosecond exciton dynamics in polyfluorene films from experiment and microscopic theory 
J.-C. Denis, S. Schumacher, G. J. Hedley, A. Ruseckas, P. O. Morawska, Y. Wang, S. Allard, U. Scherf G. A. Turnbull, I. D. W. Samuel, and I. Galbraith
Journal of Physical Chemistry C 119, 9734 (2015).

Auf dem Weg zum optischen Transistor: optische Muster in Halbleiternanostrukturen
S. Schumacher
Forschungsforum Paderborn 18, 20 (2015).

2014

Optical spectroscopy of graphene quantum dots: the case of C132 
H. Riesen, C. Wiebeler, and S. Schumacher 
Journal of Physical Chemistry A 118, 5189 (2014).

Quantum yields and reaction times of photochromic diarylethenes from ab-initio non-adiabatic molecular dynamics: normal vs. inverse type 
C. Wiebeler and S. Schumacher 
Journal of Physical Chemistry A 118, 7816 (2014).

Polycyclic aromatic hydrocarbons obtained by lateral extension of mesogenic perylene cores: Absorption and optoelectronic properties 
J. Vollbrecht, H. Bock, C. Wiebeler, S. Schumacher, and H. Kitzerow 
Chemistry - A European Journal 20, 12026 (2014). Communication.

Influence of Coulomb-induced band couplings on linear excitonic absorption spectra of semiconducting carbon nanotubes 
H. Liu, S. Schumacher, and T. Meier 
Physical Review B 89, 155407 (2014).

Formation and control of transverse patterns in a quantum fluid of microcavity polaritons 
P. Lewandowski, V. Ardizzone, Y.C. Tse, N.H. Kwong, M.H. Luk, A. Lücke, M. Abbarchi, J. Bloch, E.Baudin, E. Galopin, A. Lemaître, P.T. Leung, Ph. Roussignol, R. Binder, J. Tignon, and S. Schumacher 
Proc. SPIE 8984, 89840X (2014).

Optical spectrum, perceived color, refractive index, and non-adiabatic dynamics of the photochromic diarylethene CMTE
C. Wiebeler, C. Bader, C. Meier, and S. Schumacher 
Physical Chemistry Chemical Physics (PCCP) 16, 14531 (2014).

2013

Formation and control of Turing patterns in a coherent quantum fluid 
V. Ardizzone, P. Lewandowski, M.H. Luk, Y.C. Tse, N.H. Kwong, A. Lücke, M. Abbarchi, E. Baudin, E. Galopin, J. Bloch, A. Lemaître, P.T. Leung, Ph. Roussignol, R. Binder, J. Tignon, and S. Schumacher
Scientific Reports 3, 3016 (2013). (Nature Publishing Group)

Two-photon physics with quantum-dot biexcitons
S. Schumacher and A. Zrenner
Proc. SPIE 8623, 86230E (2013). invited paper.

Charge photogeneration in donor-acceptor conjugated materials: influence of excess excitation energy and chain length 
R. Tautz, E. Da Como, C. Wiebeler, G. Soavi, I. Dumsch, N. Fröhlich, S. Allard, U. Scherf, G. Cerullo, S. Schumacher, and J. Feldmann
Journal of the American Chemical Society (JACS) 135, 4282 (2013).  

Transverse optical instability patterns in semiconductor microcavities: polariton scattering and low-intensity all-optical switching
M.H. Luk, Y.C. Tse, N.H. Kwong, P.T. Leung, P. Lewandowski, R. Binder, and S. Schumacher
Physical Review B 87, 205307 (2013).

Spectral signatures of polarons in conjugated co-polymers
C. Wiebeler, R. Tautz, J. Feldmann, E. von Hauff, E. Da Como, and S. Schumacher
Journal of Physical Chemistry B 117, 4454 (2013). 

Excited-state absorption of conjugated polymers in the near-infrared and visible: a computational study of oligofluorenes 
S. Ling, S. Schumacher, I. Galbraith, and M. J. Paterson
Journal of Physical Chemistry C 117, 6889 (2013).

Selection rules and linear absorption spectra of carbon nanotubes in axial magnetic fields
H. Liu, S. Schumacher, and T. Meier
Physical Review B 88, 035429 (2013).

2012

Quantitative description of interactions between linear organic chromophores
J.-C. Denis, S. Schumacher, and I. Galbraith
Journal of Chemical Physics 137, 224102 (2012).
Journal front cover. Editor's Choice article.

Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting
S. Schumacher, J. Förstner, A. Zrenner, M. Florian, C. Gies, P. Gartner, and F. Jahnke
Optics Express 20, 5335 (2012).

Dynamics of fluorescence depolarization in branched oligofluorene-truxene molecules        
N. A. Montgomery, G. Hadley, A. Ruseckas, J.-C. Denis, S. Schumacher, A. L. Kanibolotsky, P. J. Skabara, I. Galbraith, G. A. Turnbull, and I. D. W. Samuel
Physical Chemistry Chemical Physics (PCCP) 14, 9176 (2012).           

2011

Optical excitations in star-shaped fluorene molecules    
N. A. Montgomery, J.-C. Denis, S. Schumacher, A. Ruseckas,  P. J. Skabara, A. L. Kanibolotsky, M. J. Paterson, I. Galbraith, G. A. Turnbull, and I. D. W. Samuel 
Journal of Physical Chemistry A 115, 2913 (2011).

Tight-binding model for the electronic and optical properties of nitride-based quantum dots    
S. Schulz, D. Mourad, S. Schumacher, and G. Czycholl    
Physica Status Solidi (b) 248, 1853 (2011). Invited Feature Article.

Photophysics of graphene quantum dots: insights from electronic structure calculations 
S. Schumacher
Physical Review B 83, 081417(R) (2011).

Selected publications before 2011

Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: a multiscale quantum-chemistry and Maxwell-Bloch equations approach
S. Schumacher, I. Galbraith, A. Ruseckas, G. A. Turnbull, and I. D. W. Samuel
Physical Review B 81, 245407 (2010).

Transverse optical patterns for ultra-low-light-level all-optical switching
A. M. C. Dawes, D. J. Gauthier, S. Schumacher, N. H. Kwong, R. Binder, and A. L. Smirl
Laser & Photonics Reviews 4, 221 (2010). Invited Review Article.

Electron-spin beat susceptibility of excitons in semiconductor quantum wells
N. H. Kwong, S. Schumacher, and R. Binder
Physical Review Letters 103, 056405 (2009).

Effect of exciton self-trapping and molecular conformation on photophysical properties of oligofluorenes
S. Schumacher, A. Ruseckas, N. A. Montgomery, P. J. Skabara, A. L. Kanibolotsky, M. J. Paterson, I. Galbraith, G. A. Turnbull, and I. D. W. Samuel
Journal of Chemical Physics 131, 154906 (2009).

All-optical signal amplification in multiple-quantum-well resonant photonic bandgap structures
S. Schumacher, N. H. Kwong, and R. Binder
Applied Physics Letters 92, 131109 (2008).

Influence of exciton-exciton correlations on the polarization characteristics of polariton amplification in semiconductor microcavities
S. Schumacher, N. H. Kwong, and R. Binder
Physical Review B 76, 245324 (2007).

Tight-binding model for semiconductor quantum dots with a wurtzite crystal structure: from one-particle properties to Coulomb correlations and optical spectra
S. Schulz, S. Schumacher, and G. Czycholl
Physical Review B 73, 245327 (2006).

Coherent propagation of polaritons in semiconductor heterostructures: nonlinear pulse transmission in theory and experiment
S. Schumacher, G. Czycholl, F. Jahnke, I. Kudyk, L. Wischmeier, I. Rückmann, T. Voss, J. Gutowski, A. Gust, and D. Hommel
Physical Review B 72, 081308(R) (2005).

Optical properties of self-organized wurtzite InN/GaN quantum dots: A combined atomistic tight-binding and full configuration-interaction calculation
N. Baer, S. Schulz, S. Schumacher, P. Gartner, G. Czycholl, F. Jahnke
Applied Physics Letters 87, 231114 (2005).

Polariton propagation in shallow-confinement heterostructures: microscopic theory and experiment showing the break-down of the dead-layer concept
S. Schumacher, G. Czycholl, F. Jahnke, I. Kudyk, L. Wischmeier, H. I. Rückmann, T. Voss, J. Gutowski, A. Gust, G. Alexe, and D. Hommel
Physical Review B 70, 235340 (2004).

Head

Prof. Dr. Stefan Schumacher

Theorie funktionaler photonischer Strukturen

Stefan Schumacher
Telefon:
+49 5251 60-2334
Fax:
+49 5251 60-3435
Büro:
A4.234
Web:

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