past events

Thursday 28. February 2013

IMPRS get-together


Place: MPL (large seminar room)

Organisation: Martin Finger (MPL / Russell Division)

Talk: Propagation of magnetic dipole waves on arrays of dielectric particles

Speaker: Dr. Oleksandr Zhuromskyy (MPL Erlangen / Research group: Nonlinear Optics and Nanophotonics NONA)


Regular arrays of high dielectric constant particles can support dipole waves, resulting from couplings between the particle's electromagnetic oscillation modes. T-matrix formalism is a powerful tool allowing to study excitation, propagation and extraction of light from such particle waveguides. The knowledge of the wave dispersion properties is essential for the construction of the perfect matching load, which provides for the complete suppression of the back reflections from the waveguide's ends. In the case of technologically simpler single particle power absorbers (consumers), field distributions obtained from the T-matrix simulations can be used to optimize the efficiency of power throughput.

Thursday 31. January 2013

IMPRS get-together (Kopie 25)


Place: MPL (large seminar room

Organisation: Georg Epple (MPL / Russell Division)

Talk: Ultralong-range Rydberg molecules

Speaker: Dr. Robert Löw (University of Stuttgart)


Ultralong-range Rydberg molecules are bound states of a Rydberg atom with ground state atoms. In this talk first the physical foundations of these molecules and the experimental requirements for their production are introduced. Afterwards a set of experiments dedicated to the coherence times of the molecules is presented. In the end the polarizabilty of the Rydberg-molecules and how a homonuclear molecule can produce a permanent dipole moment is discussed.


Thursday 24. January 2013

MPL Distinguished Lecturer Series (Kopie 3)


Prof. Andreas Tünnermann (Fraunhofer Institute for Applied Optics and Precision Engineering, Friedrich Schiller University Jena, Institute of Applied Physics)


MPL / large seminar room (*435)


Humanity faces today multitude of challenges as energy consumption and climate change, healthcare in an ageing society, the knowledge society and public safety and security. The sustainable use of light “Green Photonics” can contribute to solve these pressing future issues.

Essential operation fields are

  • alternative methods of energy conversion
  • decreasing of energy consumption and efficient use of natural resources
  • conservation of climate and environment
  • Food protection and health care.

Green Photonics brings together the various application possibilities of light for protecting the environment and healthy living. These include optical and optoelectronic technologies which save energy, reduce emissions from greenhouse gases, avoid polluting the environment, or contribute to environmentally compatible and sustainable production. The use of resource and environmentally friendly, i.e. “green” optical technologies holds enormous economic potential, ranging from efficient lasers via optical metrology and sensor technology to power-saving lighting and effective CO2-neutral energy conversion.

A great amount of energy could be saved in the area of lighting. Today, around 20 percent of the total demand for electricity around the world is used for lighting purposes. Around 50 percent of this could be saved by using more efficient light sources, corresponding to the total electrical energy requirements of Western Europe and a CO2 equivalent of 600 million tons. In the field of resource-friendly power generation, photovoltaics and solar-thermal energy are increasing in importance. The aim here must be to continue increasing efficiency while simultaneously reducing costs with new concepts and alternative technologies. “Green Photonics” also play an important role in the development of sustainable and energy-efficient production processes, for example in laser welding or the manufacture of vehicle components in the automotive industry. In this regard, ultrashort-pulse fiber lasers which can be used highly efficiently in micro-material processing are particularly promising. The field of information and communication consumes two to three percent of world energy requirements today, and this power consumption is increasing by up to 20 percent a year in the light of rapidly rising data traffic. Here too, considerable energy savings could be achieved with improved optical networks. In climate research, optical sensors in satellite-aided earth observation systems help in detecting pollutants in the air or sea, early recognition of environmental disasters, and the development of countermeasures.

In this contribution, novel developments in the sustainable use of light are reviewed and perspectives of Green Photonics discussed. 

Tuesday 11. December 2012

IMPRS get-together (Kopie 24)


Place: ECAP (Erwin-Rommel-Str. 1), room 307

Organisation: Mykhaylo Filipenko (ECAP)

Talk: Neutrino-oscillations and the Double Chooz Experiment

Speaker: Nils Haag (Technical University, Munich)

Thursday 06. December 2012

MPL Distinguished Lecturer Series

Time: 3 pm

Place: MPL / large seminar room (*435)

Title: Coherent Back Scattering and Anderson Localization of Ultra Cold Atoms

Speaker: Prof. Alain Aspect (Institut d'Optique, Palaiseau/France)


We use ultra cold atoms in a disordered potential created with a laser speckle, to study Anderson Localization (AL) and Coherent Back Scattering (CBS). Localization has been observed in 1D and 3D, and 2D experiments are promising. Theory supports the conclusion that what we observe is AL, but a direct evidence of the role of coherence is desirable.Recently, we have observed CBS, an indisputable coherent effect in quantum transport, related to the first order manifestation of localization (weak localization).

Wednesday 28. November 2012

IMPRS Interview Days (Kopie 3)

IMPRS Interviews 2012-2

Interviews scheduled for November 27th and 28th (14:00-17:30)

Guided tour through IMPRS partner institutions planned for November 26th

Thursday 22. November 2012

MPL Distinguished Lecturer Series

Controlling and Exploring Quantum Matter

Time: 3 pm

Place: MPL / large seminar room (*435)

Title: Controlling and Exploring Quantum Matter

Speaker: Prof. Immanuel Bloch (Max Planck Institute of Quantum Optics/LMU Munich)


Over the past years, ultracold quantum gases in optical lattices have offered remarkable opportunities to investigate static and dynamic properties of strongly correlated bosonic or fermionic quantum many-body systems. In this talk, I will show how it has recently not only become possible to image such quantum gases with single atom sensitivity and single site resolution, but also how it is now possible to coherently control single atoms on individual lattice sites. I will demonstrate how 'Higgs' type excitations occur at 24 orders of magnitude lower energy scales than in high energy experiments and how they can detected in our experimental setting. Finally, I will present a new method to realize artificial gauge fields for ultracold atoms and show a novel method how to measure the Berry-Zak phase of topological band-structures using ultracold atoms.

Thursday 08. November 2012

MPL Distinguished Lecturer Series

Plasmonics - From Quantum Effects to Fano Interference and Light Harvesting

Time: 3 pm

Place: MPL / large seminar room (*435)

Title: Plasmonics - From Quantum Effects to Fano Interference and Light Harvesting

Speaker: Prof. Peter Nordlander (Rice University)


The "plasmon hybridization" paradigm shows that the plasmon resonances in complex metallic nanostructures interact and hybridize in a manner analogous to how atomic orbitals interact and form collective states in molecules.[1] The insight gained from this concept provides an important conceptual foundation for the development of new plasmonic structures that can serve as substrates for surface enhanced spectroscopies, chemical and biomolecular sensing, and subwavelength passive and active optical devices.[2] The talk is comprised of general overview material interspersed with more specialized "hot topics" such as plasmonic radiative coherence and interference effects,[3] quantum plasmonics[4], quantum plexcitonics,[5] active plasmonic nanoantennas for enhanced light harvesting,[6] and plasmon induced chemical reactions.[7]

[1] E. Prodan et al., Science 302(2003)419

[2] N.J. Halas et al., Chem. Rev. 111(2011)3913

[3] B. Lukyanchuk et al., Nature Mat. 9(2010)707

[4] R. Esteban et al., Nat. Comm. 3(2012)825

[5] A. Manjavacas et al., Nano Lett. 11(2011)2318; ACS Nano 6(2012)1724

[6] M. W. Knight et al., Science 332(2011)702, Nano Lett. 12(2012)3808

[7] R. Huschka et al., J. Am. Chem. Soc. 133(2011)12247

Wednesday 07. November 2012

IMPRS get-together (Kopie 23)

Place: large seminar room / MPL

Organisation: Federico Belli (MPL, Russell Division)

Talk: The angular momentum of light

Speaker: Prof. Andrea Aiello (MPL)


Every student knows that massive spinning objects, like a bicycle wheel, possess an angular momentum directed along the axis of rotation. Perhaps fewer students know that also non-massive physical systems, as light, may exhibit an angular momentum which becomes manifest when light interacts with matter. In this talk I will present a general survey of angular momentum of light mainly focusing on its historical development. In addition, I will illustrate some examples of relevant practical and fundamental applications of this fascinating and timely subject.

Thursday 18. October 2012

MPL Distinguished Lecturer Series

Femtosecond Optics: More Than Just Really Fast

Time: 3 pm

Place: MPL / large seminar room (*435)

Title: Femtosecond Optics: More Than Just Really Fast

Speaker: Prof. Erich P. Ippen (Massachusetts Institute of Technology)


Advances in femtosecond lasers that are making it possible to generate pulses with durations on the order of one optical cycle are also providing the capabilities for better clocks, coherent broadband frequency combs, attosecond timing synchronization and precision sampling for improved analog-to digital signal conversion. By spatially separating and rapidly modulating many individual comb frequencies, truly arbitrary optical-frequency electric-field waveforms can be generated. This talk will describe recent progress toward these goals based on Ti:sapphire and fiber laser technologies to cover the wavelength range of 500nm - 2µm.