Newsletter November 2017
Dear colleagues and friends of the HI-Jena,
Welcome to the autumn issue of our newsletter. Below you find informations about the latest news and activities of our institute
Helmholtz Institute Jena
Tracing the phase of focused broadband laser pulses
Broadband coherent light sources are used in a wide range of applications today. Examples include ophthalmology, telecommunication, femtochemistry, attosecond-science and light-driven electronics. In almost all applications theses light pulses are focused. Researchers of the Helmholtz Institute Jena together with the Friedrich-Alexander University Erlangen have now shown that for broad bandwidth few-cycle light pulses the optical phase behaves very different from the well-known and commonly used Gouy phase, which has been known for more than 100 years and describes the phase evolution of monochromatic focused light beams . The optical phase evolution was measured by virtue of laser-induced electron emission and rescattering from a nanometre sharp metal tip, which is raster-scanned through the focus of a pulsed femtosecond laser beam. In this way, a temporal resolution on the order of attoseconds (10-18 s) and a spatial resolution on the order of nanometres (10-9 m) is achieved. The experimental results can be explained by theoretical calculations  and were published recently in Ref. . From these findings, conclusions can be drawn about how to manipulate the focal phase in order to steer and control the ultrafast interactions between light and matter and will make it possible to control electron dynamics and chemical reactions by facilitating novel spatial phase distributions . These insights into fundamental physics will further the development of new radiation sources and the field of light wave electronics.
 Gouy, L. G. Sur une propriété nouvelle des ondes lumineuses. C. R. Acad. Sci. Paris 110, 1251–1253 (1890).
 Porras, M. A. Characterization of the electric field of focused pulsed Gaussian beams for phase-sensitive interactions with matter. Opt. Lett. 34, 1546–1548 (2009).
 Hoff D, Krüger M, Maisenbacher L, Sayler AM, Paulus GG, Hommelhoff P, Tracing the phase of focused broadband laser pulses, Nat. Phys. 13 947 – 51 (2017).
 Hoff D, Krüger M, Maisenbacher L, Paulus GG, Hommelhoff P, Sayler AM, Using the focal phase to control attosecond processes, J. Opt. (2017).
News and Announcements
The Helmholtz Institute Jena is member of the newly established Max Planck School of Photonics, an excellence network for photonic science.
Starting from 2018 the German Federal Ministry of Education and Research (BMBF) supports a total of three Max Planck Schools for the upcoming five years. The nationwide networks are supposed to strengthen and bundle the competences and expertise of a science research field. In this sense the MPSP focuses on investigations in the field of photonics, for example attosecond physics or quantum optics. In the framework of the school scientists and students from institutes of the four large German research organizations and seven universities will collaborate and study in an interdisciplinary environment. The school has its coordinating center in Jena. Here the Fraunhofer Institute for Applied Optics and Precision Engineering, the Friedrich Schiller University, the Leibniz Institute of Photonic Technology, and the Helmholtz Institute Jena are cooperating together. Further partners in Germany are six other universities, three Max Planck Institutes, one additional Fraunhofer Institute and the Helmholtz Center DESY.
Futher details can be found here:
Fifth joint Lecture Week of RS-APS and HGS-HIRe was held in Willingen
The fifth joint Lecture Week of HGS-HIRe and RS-APS was held at “Seminarhaus Lieb`Lommerke” in Willingen from September 17 to September 22 this year. This year topic was “Laser-Particle Acceleration for Basic Research and Ion Therapy” presented by the lecturers Malte Kaluza (U Jena), Sergey Rykovanov (HI Jena) and Michael Scholz (GSI). The Lecture Week was completed by a lecture (Claude Krantz/U Heidelberg) at the Marburg Ion Therapy Center MIT and a guided tour of the therapy accelerator facility (Uwe Scheeler/ U Heidelberg).
Seminar room HI-Jena, Fröbelstieg 3
Recently finished theses
Probing Strong-field Photoionization of Atoms and Diatomic Molecules with Short-wave Infrared Radiation
Laserspektroskopie an hochgeladenen Bismutionen zum Test der Quantenelektrodynamik
Tadpole diagrams in constant electromagnetic fields
J. High Energ. Phys. 2017, 75 (2017)
Commissioning of a Si(Li) Compton polarimeter with improved energy resolution
M. Vockert, G. Weber, U. Spillmann, T. Krings, M. Herdrich, and Th. Stöhlker
Nucl. Instr. Meth. Phys. Res. B 408, 313 (2017)
Fast calculator for X-ray emission due to Radiative Recombination and Radiative Electron Capture in relativistic heavy-ion atom collisions
M. Herdrich, G. Weber, A. Gumberidze, Z. Wu, and Th. Stöhlker
Nucl. Instr. Meth. Phys. Res. B 408, 294 (2017)
The Next Generation of Cryogenic Current Comparators for Beam Monitoring
V. Tympel, J. Golm, R. Neubert, P. Seidel, M. Schmelz, R. Stolz, V. Zakosarenko, F. Kurian, M. Schwickert, T. Sieber, and Th. Stöhlker
Transition radiation at the boundary of a chiral isotropic medium
S. Galyamin, A. Tyukhtin, and A. Peshkov
Phys. Rev. E 95, 032142 (2017)
X-ray emission generated by laser-produced plasmas from dielectric nanostructured targets
Z. Samsonova, S. Höfer, A. Hoffmann, B. Landgraf, M. Zürch, I. Uschmann, D. Khaghani, O. Rosmej, P. Neumayer, R. Röder, L. Trefflich, C. Ronning, E. Förster, C. Spielmann, and D. Kartashov
AIP Conf. Proc. 1811, 180001 (2017)