Arthur Schönberg

Doctoral project

Nonlinear optics using multi-pass guiding concepts

In my PhD thesis at the DESY laser group, I focus on the physics of nonlinear optics within multi-pass geometries. My main project is the development of new multi-pass cell (MPC)-based laser pulse post compression schemes, where I work on overcoming limitations in current MPC technology. Part of my work is to develop and test new types of MPCs, which allow post-compression of high-energy laser pulses of up to 100 mJ or higher from picoseconds to 10s of femtoseconds pulse duration. At the same time, the aim is to keep the setup at a compact, table-top size.

While MPC post-compression is my main project, I also work on employing effects from nonlinear optics such as e.g. (high-)harmonic-generation or four-wave-mixing in gases (or other materials) into multi-pass cells. This can potentially increase the efficiency of these processes and further push towards more efficient light sources in a broad range of the electromagnetic spectrum. With the development and advance of laser-mirror coating technology, an even wider range of processes and wavelengths may become applicable to multi-pass cells in the future, providing a great manifold of physics and nonlinear optics to be studied within the context of MPCs.

Publications:

2020:

P. Balla, A. B. Wahid, I. Sytcevich, C. Guo, A.-L.Viotti, L. Silletti, A. Cartella, S. Alisauskas, H. Tavakol, U. Grosse-Wortmann, A. Schönberg, M. Seidel, A. Trabattoni, B. Manschwetus, T. Lang, F. Calegari, A. Couairon, A. L’Huillier, C. L. Arnold, I. Hartl, and C. M. Heyl, "Postcompression of picosecond pulses into the few-cycle regime," Opt. Lett. 45, 2572-2575 (2020), DOI: 10.1364/OL.388665

2021:

A. Schönberg, H. S. Salman, A. Tajalli, I. Hartl and C. M. Heyl, "7th harmonic generation in gases for coherent 150 nm light production", 2021 Conference on Lasers and Electro-Optics Europe ad European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021, DOI: 10.1109/CLEO/Europe-EQEC52157.2021.9542161

E. Appi, C. C. Papadopoulou, J. L. Mapa, C. Jusko, P. Mosel, A. Schoenberg, J. Stock, T. Feigl, S. Ališauskas, T. Lang, C. M. Heyl, B. Manschwetus, M. Brachmanski, M. Braune, H. Lindenblatt, F. Trost, S. Meister, P. Schoch, A. Trabattoni, F. Calegari, R. Treusch, R. Moshammer, I. Hartl, U. Morgner, and M. Kovacev , "Synchronized beamline at FLASH2 based on high-order harmonic generation for two-color dynamics studies", Review of Scientific Instruments 92, 123004 (2021), DOI: 10.1063/5.0063225

2022:

C. M. Heyl, M. Seidel, E. Escoto, A. Schönberg, S. Carlström, G. Arisholm, T. Lang and I. Hartl, 2022 J. Phys. Photonics 4 04002, DOI: 10.1088/2515-7647/ac483a