News and Events
The Max Planck School of Photonics offers interested listeners all over the world the opportunity to gain insights into exciting research on photonics in various formats and for free. Here you find all dates and registration links for the upcoming events.
MPSP Lecture Series
We are proud to have the top German scientists in the field of photonics among our Fellows of the Max Planck School of Photonics. All of them are conducting cutting-edge research in the different areas of photonics. In a lecture series, they provide insights into their topics. Join the discussion after the exciting presentations of our Fellows! Please register for each virtual lecture of the Lecture Series using the respective link.
3D Laser Nanoprinting (15.07.2020, 5-6 pm CEST)
Prof. Dr. Martin Wegener
This webinar follows a recently published review and perspectives article on 3D laser nanoprinting (V. Hahn et al., Opt. Photon. News 30(10), 28-35 (2019)). I will review the underlying physical principles, describe the state-of-the art in the context of many other alternative 3D additive manufacturing approaches, and emphasize two challenges: (i) Substantially faster and scalable 3D printing with sub-micrometer voxel sizes, and (ii) multi-material 3D nanoprinting. (i) I will present recent results of MPSP PhD student Vincent Hahn on rapid multi-focus 3D laser nanoprinting leading to printing rates around 10^7 voxels/s at sub-micrometer voxels sizes. For example, this has led to 3D mechanical metamaterials with more than 100 thousand unit cells and more than 300 billion voxels total. Furthermore, I will sketch our ideas to go well beyond this by introducing light-sheet 3D laser nanoprinting. (ii) I will discuss three different approaches towards multi-material architectures: (a) integrated microfluidic chamber, (b) stimuli-assisted 3D laser nanoprinting, and (c) meta-inks.
Ultrafast and ultrasmall: Attosecond chronoscopy and reaction nanoscopy (29.07.2020, 5-6 pm CEST)
Prof. Dr. Matthias Kling
One of the most fundamental processes in nature is light-induced photoemission of electrons. Attosecond chronoscopy with ultrashort laser pulses has revealed small but measurable delays in photoionization, characterized by the ejection of an electron upon absorption of a single photon.
Ionization delay measurements in atomic targets provide a wealth of information about the timing of the photoelectric effect, resonances, electron correlations and transport. The extension of this approach to molecules, however, presents great challenges. In addition to the difficulty of identifying correct ionization channels, it is hard to disentangle the role of the anisotropic molecular landscape from the delays inherent to the excitation process itself. In the talk, I will show measurements of ionization delays from ethyl iodide around the iodine 4d giant dipole resonance employing attosecond streaking spectroscopy.
Improved Sensing of Circular Dichroism Using Dielectric Photonic Structures (12.8.2020, 5-6 pm CEST)
Prof. Dr. Carsten Rockstuhl
Measuring the circular dichroism (CD), i.e. the differential absorption of left and right handed circularly polarized light, from a chiral molecular solution is a canonical method to distinguish the two different enantiomers. It is particularly important in pharmacy but also in other fields of science. However, as only the difference in absorption is measured, the signal is tiny and long integration times are needed. This is undesirable and many efforts are currently put in place to explore supporting photonic materials that enhance the CD signal.
Here we summarize our recent efforts in this field. We argue that a suitable photonic structure should be (a) achiral, (b) helicity preserving, and (c) optically resonant. Only if the first condition is met, the CD signal depends on the chiral absorption properties of the molecule. If the second condition is met, the enhancement of the CD signal for a given ability of the structure to enhance the field is maximized.
We show that suitably shaped dielectric discs perfectly accommodate all requirements . Making cavities out of such material allows to obtain enhancement factors averaged across the cavity volume as large as 100 . The maximum enhancement in some selected spatial locations can be even as large as 2000!
. Graf F. et al., ACS Photonics, (2019), 6, 482
. Feis J. et al., Physical Review Letters, (2020), 124, 033201
MPSP Lunch- and Coffee Breaks
Not only our fellows give insights into their research - the "MPSP Lunch/Coffee Break" offers students of the Max Planck School of Photonics and also external PhDs the opportunity for a virtual scientific exchange.
The MPSP Lunch/Coffee Break is a virtual conference, where people with a passion for physics come to share knowledge, learn new things and meet new people. In every session, there are one or two short presentations from PhD Candidates, Fellows, Invited Specialist, Professors or so on. Afterwwards, we can discuss about our research topics and learn from each other.
You find the Presentation Topic of the next virtual Lunch Breaks and the Registration Link below. To present your work, please write to us two weeks ahead at this email: firstname.lastname@example.org
We see you there!
Next Photonic Coffee Break: Monday, 06.07.2020, 5 pm (CEST = UTC+2)
Presentation topic: "Plasma generation by Nd:YAG and CO2 lasers and its monitoring
during laser welding" (by Vlad Medvedev)
If you want to learn more about the topics of the next MPSP Lunch Break, visit our Social Media Channels: