BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Current status of Chemical Infrared Imaging (CIRI / SOLAIR) beamli ne in Solaris DTSTART;VALUE=DATE-TIME:20220705T155500Z DTEND;VALUE=DATE-TIME:20220705T161500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-806@events.ncbj.gov.pl DESCRIPTION:Speakers: Tomasz Wróbel (Solaris National Synchrotron Radiati on Centre\, Jagiellonian University\, Czerwone Maki 98\, 30-392 Krakow\, P oland)\nThe Chemical Infrared Imaging (CIRI) /Solaris Advanced InfraRed be amline (SOLAIR) is currently under construction. The large radiation extra ction from a bending magnet will allow to collect a very wide wavelength r ange (0.4 - 500 µm)\, covering the near (NIR)\,_mid (MIR) and the far (FI R) infrared spectral range. The extraction of infrared range of synchrotro n radiation will be achieved using a flat and slotted mirror (M1)\, which will be located inside the dipole chamber located at the bending magnet in the storage ring. \n \nThe presentation will showcase the current status of the project along with the expected IR beam parameters. It will also hi ghlight microscopic techniques (FT-IR\, s-SNOM and PTIR) planned to be use d at the beamline with potential applications.\n\nhttps://events.ncbj.gov. pl/event/75/contributions/806/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/806/ END:VEVENT BEGIN:VEVENT SUMMARY:THz optics – achievements\, challenges\, and prospects DTSTART;VALUE=DATE-TIME:20220705T151500Z DTEND;VALUE=DATE-TIME:20220705T153500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-805@events.ncbj.gov.pl DESCRIPTION:Speakers: Agnieszka Siemion (Warsaw University of Technology)\ nTerahertz radiation lies at the boundary of two different domains—optic s and electronics. This\, still not fully explored\, area entwines physica l phenomena describing two permeating worlds and interfering laws of optic s and electronics. The fusion of two superposing physical worlds becomes a n enormous challenge in designing optical elements.\nAll types of optical structures have been implemented for the THz waves\, starting from reflect ive optics\, going through refractive and diffractive optics\, and ending on metamaterials. They all require different designing methods\, manufactu ring technologies and materials\, and verification setups. Applicability o f particular types of THz optics also strongly depends on the frequency sp ectrum\, expected efficiency\, working conditions\, complexity\, and price . All of these must be considered when dedicated optical elements are desi gned.\nThis work presents a variety of terahertz optical elements designed by our team. They include a variety of types\, design methods (theoretica l equations\, backward propagation\, iterative algorithms)\, design wavele ngths (from sub-THz band to single terahertz)\, and applications (medical diagnostics\, imaging\, telecommunication). However\, all these elements h ave one thing in common – they are dedicated to particular setups and ap plications\, always ensuring optimized and the best possible performance i n given conditions.\n\nhttps://events.ncbj.gov.pl/event/75/contributions/8 05/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/805/ END:VEVENT BEGIN:VEVENT SUMMARY:Superradiant terahertz facilities for high field Terahertz Science – the first 2 decades DTSTART;VALUE=DATE-TIME:20220705T133000Z DTEND;VALUE=DATE-TIME:20220705T141500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-783@events.ncbj.gov.pl DESCRIPTION:Speakers: Michael Gensch (DLR Institut für Optische Sensorsys teme / TU Berlin)\nUltrashort flashes of THz light with low photon energie s of a few meV\, but strong electric or magnetic field transients have in the past two decades been increasingly employed to prepare various fascin ating nonequilibrium states in matter. Superradiant Terahertz radiation fr om linear accelerators\, first demonstrated in 2001 at Jefferson lab [1]\, is the working principle of a new class of sources for high-field THz p ulses which turned out to be ideally suited to perform experiments of this type. Over the past 20 years several superradiant THz facilities have bee n commissioned (see e.g. [2]) from facilities operating parasitically at t he linac of soft X-ray free electron lasers [3\,4] to dedicated compact fa cilities operating at high repetition rates based on superconducting linac technology [5]. This talk will give an overview of these developments and will discuss some of the scientific highlight experiments. An outlook int o proposed next generation facilities is given which will include faciliti es at hard X-ray free electron lasers [6\,7] and dedicated multi-user faci lities. In addition\, emerging new experimental opportunities are presente d.\n\n[1] L. Carr et al\, High-power terahertz radiation from relativistic electrons\, Nature 420\, 153 (2001).\n[2] M. Gensch et al\, SUPER-RADIANT LINAC-BASED THz SOURCES IN 2013\, proceed. Of FEL 2013\, New York\, WEIBN O01 (2013).\n[3] A. Perucchi et al\, The TeraFERMI terahertz source at the seeded FERMI free-electron-laser facility\, Rev. Sci. Instr. 84\, 022702 (2013).\n[4] M. Gensch et al\, New infrared undulator beamline at FLASH\, Infrared Phys. Technol. 51\, 423 (2008).\n[5] B. Green et al\, High-field high-repetition-rate sources for the coherent THz control of matter\, Sci. Rep. 6\, 22256 (2016).\n[6] T. Tanikawa et al\, Volt-per-Ångstrom terahe rtz fields from X-ray free-electron lasers\, J. Synch. Rad. 27\, 796 (2020 ).\n[7] Z. Zhang et al\, A high-power\, high-repetition-rate THz source fo r pump–probe experiments at Linac Coherent Light Source II\, J. Synch. R ad. 27\, 890 (2020).\n\nhttps://events.ncbj.gov.pl/event/75/contributions/ 783/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/783/ END:VEVENT BEGIN:VEVENT SUMMARY:PolFEL project: towards the construction of the Polish THz/IR/VUV Free Electron Laser DTSTART;VALUE=DATE-TIME:20220705T141500Z DTEND;VALUE=DATE-TIME:20220705T143500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-779@events.ncbj.gov.pl DESCRIPTION:Speakers: Paweł Krawczyk (NCBJ)\nThe idea of building a 4th g eneration accelerator based light source at NCBJ has been developed for al most 20 years. The concept came to reality in 2018 after receiving the fun ding for the construction of the Polish Free Electron Laser – PolFEL (or formally\, its first stage ). The PolFEL device will be driven with an RF continuous-wave superconducting linac\, including a superconducting injec tor furnished with an in house developed lead film superconducting photoca thode. The linac will be split into three branches feeding the undulator chains dedicated to THz\, IR and UV/VUV coherent electromagnetic radiation emission\, respectively. In effect\, PolFEL will provide a wide range of light with wavelengths from 0.6 mm down to 60 nm. In addition\, the facili ty will be furnished with a station generating short X-ray pulses in the i nverse Compton scattering process. In the presentation\, we will describe the PolFEL facility and its research capabilities in more details. The cu rrent status of the project and its timetable will be also presented. Fina lly\, we will indicate the plans for further extension of the facility in the second stage the preparation for which should start right after the co mpletion of the current stage.\n\nhttps://events.ncbj.gov.pl/event/75/cont ributions/779/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/779/ END:VEVENT BEGIN:VEVENT SUMMARY:Research potential of the PolFEL facility for THz studies. DTSTART;VALUE=DATE-TIME:20220705T143500Z DTEND;VALUE=DATE-TIME:20220705T151500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-732@events.ncbj.gov.pl DESCRIPTION:Speakers: Pawel Czuma (NCBJ)\nPolish Free Electron Laser (PolF EL) will be an accelerator based facility\, which will provide researchers THz laser pulses with constant repetition rate of 50kHz. Maximum peak ene rgy of these THz pulse (30µJ) and pulse duration (about 30ps) for such r epetition rates are usually not achievable by typical optical laser source s. This parameters of PolFEL laser THz beam give big research potential in area of THz studies. To help scientists discover this potential\, experi mental station will be equipped with femtosecond pulse laser system: oscil lator\, amplifier and two Optical Parametric Amplifiers (OPA)\, and two re search station: pump-probe (PP) spectrometer and Scattering Nearfield Opti cal Microscope (SNOM). PP spectrometer with aid of two OPA will allow for time-resolved measurements of THz spectra with picosecond time resolution. Synchronization between two lasers: experimental station and photocathode laser\, will allow jitter limitation between THz pulses and optical laser pulses in PP spectrometer. SNOM will allow visualization of specimen in THz beam with sub-micrometer spatial resolution. Together with AFM and FT IR module and with help of IR laser beam from OPA\, SNOM will give researc hers a grate multi-tool for visualization of specimen surface with sub-mic ron spatial resolution in spectral range from mid IR to 1THz. PolFEL facil ity will also provide additional space for scientists with their own equip ment. PolFEL scientists and engineers will help with integration of such e quipment with laser beams available in PolFEL.\n\nhttps://events.ncbj.gov. pl/event/75/contributions/732/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/732/ END:VEVENT BEGIN:VEVENT SUMMARY:Nonlinear response of semiconductor systems under intense THz exci tation DTSTART;VALUE=DATE-TIME:20220705T153500Z DTEND;VALUE=DATE-TIME:20220705T155500Z DTSTAMP;VALUE=DATE-TIME:20260516T030053Z UID:indico-contribution-81-720@events.ncbj.gov.pl DESCRIPTION:Speakers: Oleksiy Pashkin (Helmholtz-Zentrum Dresden-Rossendor f)\nIntense narrowband terahertz pulses from the FELBE free-electron laser facility and a complementary table-top high-field THz source are utilized to study nonlinear excitation regimes of various degrees of freedom in se miconductors. In this talk we present several recent examples including im purity transitions in boron doped Si [1]\, intersubband transitions in Ge/ SiGe quantum wells [2] and plasmons in InGaAs nanowires [3\,4].\n\n\n[1] F . Meng et al.\, *Phys. Rev. B* **102**\, 075205 (2020).\n[2] C. Ciano et a l.\, *Optics Express* **28**\, 7245 (2020).\n[3] D. Lang et al.\, *Nanotec hnology* **30**\, 084003 (2019).\n[4] R. Rana et al.\, *Nano Lett.* **20** \, 3225 (2020).\n\nhttps://events.ncbj.gov.pl/event/75/contributions/720/ LOCATION:Novotel Warszawa Centrum Róża URL:https://events.ncbj.gov.pl/event/75/contributions/720/ END:VEVENT END:VCALENDAR