C 8 - Coherent FEL and high-harmonic pulses and their wavefronts

The objective of this project is the brilliance improvement of short wavelength HHG and FEL sources for soft x-ray microscopy and CDI applications. For that purpose techniques for measurement and optimization of wavefront and spatial coherence properties shall be developed and applied to HHG and FEL beams. Benefiting from these studies, an HHG-based CDI setup shall be modified for substantially higher resolution and shorter wavelengths. This will include the investigation of waveguiding phenomena and novel optical components to control the beam profile and polarization state of coherent EUV radiation.

Members of this project:

Prof. Dr Claus Ropers
Dr. Klaus Mann
Dr. Sergej Yalunin


Sivis, M., Pazos-Perez, N., Yu, R., Alvarez-Puebla, R., García de Abajo, F. J. and Ropers, C. (2018)
Continuous-wave multiphoton photoemission from plasmonic nanostars
Communications Physics, 1(13), DOI:10.1038/s42005-018-0014-7

Sivis, M., Taucer, M., Vampa, G., Jonston, K., Staudte, A., Yu. Naumov, A., Villeneuve, D. M., Ropers, C. and Corkum, P. B. (2017)
Tailored semiconductors for high-harmonic optoelectronics
Science, 357: 303-306, DOI:20.1126/science.aan2395

Yalunin, S., Schröder, B. and Ropers, C. (2016)
Theory of electron energy loss near plasmonic wires, nanorods, and cones
Rhysical Review B, 93: 115408, DOI:10.1103/PhysRevB.93.115408

Zayko, S., M., S., Schäfer, S. and Ropers, C. (2016)
Polarization contrast of nanoscale waveguides in high harmonic imaging
Optica, 3(3): 240, DOI:org/10.1364/OPTICA.3.000239

Mey, T., Zayko, S., Ropers, C., Schäfer, B. and Mann, K. (2015)
Toroidal grating astigmatism of high-harmonics characterized by EUV Hartmann sensor
Optics Express, 23: 15310-15315, DOI:10.1364/OE.23.015310

Mey, T., Schäfer, B. and Mann, K. (2014)
Measurement of the Wigner distribution function of non-separable laser beams employing a toroidal mirror
New Journal of Physics, 16: 123042, DOI:doi:10.1088/1367-2630/16/12/123042

Mey, T., Schäfer, B., Mann, K., Keitel, B., Kuhlmann, M. and Plönjes, E. (2014)
Wigner distribution measurements of the spatial coherence properties of the free-electron laser FLASH.
Opt. Express, 22(13): 16571-84, DOI:10.1364/OE.22.016571

Schäfer, B., Mey, T., Mann, K., Keitel, B., Kreis, S., Kuhlmann, M., Plönjes-Palm, E. and Tiedtke, K. (2013)
Beam characterization of FLASH from beam profile measurement by intensity transport equation and reconstruction of the Wigner distribution function
Tschentscher, T. & Tiedtke, K.Proc. SPIE, 8778: 877810, DOI:10.1117/12.2016975

Sivis, M., Duwe, M., Abel, B. and Ropers, C. (2013)
Extreme-ultraviolet light generation in plasmonic nanostructures
Nat. Phys.Nature Publishing Group,, 9(5): 304-309, DOI:10.1038/nphys2590

Sivis, M. and Ropers, C. (2013)
Generation and Bistability of a Waveguide Nanoplasma Observed by Enhanced Extreme-Ultraviolet Fluorescence
Phys. Rev. Lett., 111(8): 085001, DOI:10.1103/PhysRevLett.111.085001

Yalunin, S. V., Herink, G., Solli, D. R., Krüger, M., Hommelhoff, P., Diehn, M., Munk, A. and Ropers, C. (2013)
Field localization and rescattering in tip-enhanced photoemission
Ann. Phys., 525(1-2): L12-L18, DOI:10.1002/andp.201200224

Herink, G., Solli, D. R., Gulde, M. and Ropers, C. (2012)
Field-driven photoemission from nanostructures quenches the quiver motion.
NatureNature Publishing Group,, 483(7388): 190-3, DOI:10.1038/nature10878

Mey, T., Rein, M., Groß mann, P. and Mann, K. (2012)
Brilliance improvement of laser-produced soft x-ray plasma by a barrel shock
New J. Phys., 14(7): 073045, DOI:10.1088/1367-2630/14/7/073045

Paarmann, A., Gulde, M., M^uuml;ller, M., Schäfer, S., Schweda, S., Maiti, M., Xu, C., Hohage, T., Schenk, F., Ropers, C. and Ernstorfer, R. (2012)
Coherent femtosecond low-energy single-electron pulses for time-resolved diffraction and imaging: A numerical study
J. Appl. Phys., 112(11): 113109, DOI:10.1063/1.4768204

Schäfer, B., Flöter, B., Mey, T., Juranic, P., Kapitzki, S., Keitel, B., Plönjes, E., Mann, K. and Tiedtke, K. (2011)
FEL beam characterization from measurements of the Wigner distribution function
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., 654(1): 502-507, DOI:10.1016/j.nima.2011.07.031

Flöter, B., Juranić, P., Großmann, P., Kapitzki, S., Keitel, B., Mann, K., Plönjes, E., Schäfer, B. and Tiedtke, K. (2011)
Beam parameters of FLASH beamline BL1 from Hartmann wavefront measurements
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., 635(1): S108-S112, DOI:10.1016/j.nima.2010.10.016

Schäfer, B. and Mann, K. (2011)
Characterization of an ArF excimer laser beam from measurements of the Wigner distribution function
New J. Phys., 13(4): 043013, DOI:10.1088/1367-2630/13/4/043013

Yalunin, S. V., Gulde, M. and Ropers, C. (2011)
Strong-field photoemission from surfaces: Theoretical approaches
Physical Review B - Condensed Matter and Materials Physics, 84, DOI:10.1103/PhysRevB.84.195426