TY  - GEN
A1  - Pavlenko, Elena S.
A1  - Sander, Mathias
A1  - Mitzscherling, Steffen
A1  - Pudell, Jan-Etienne
A1  - Zamponi, Flavio
A1  - Rössle, Matthias
A1  - Bojahr, Andre
A1  - Bargheer, Matias
T1  - Azobenzene – functionalized polyelectrolyte nanolayers as ultrafast optoacoustic transducers
N2  - We introduce azobenzene-functionalized polyelectrolyte multilayers as efficient, inexpensive optoacoustic transducers for hyper-sound strain waves in the GHz range. By picosecond transient reflectivity measurements we study the creation of nanoscale strain waves, their reflection from interfaces, damping by scattering from nanoparticles and propagation in soft and hard adjacent materials like polymer layers, quartz and mica. The amplitude of the generated strain ε ∼ 5 × 10−4 is calibrated by ultrafast X-ray diffraction.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 297 
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-101996
VL  - 8
SP  - 13297
EP  - 13302
ER  - 
TY  - GEN
A1  - Zeuschner, Steffen
A1  - Parpiiev, Tymur
A1  - Pezeril, Thomas
A1  - Hillion, Arnaud
A1  - Dumesnil, Karine
A1  - Anane, Abdelmadjid
A1  - Pudell, Jan-Etienne
A1  - Willig, Lisa
A1  - Rössle, Matthias
A1  - Herzog, Marc
A1  - von Reppert, Alexander
A1  - Bargheer, Matias
T1  - Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction
T2  - Postprints der Universität Potsdam : Mathematisch-naturwissenschaftliche Reihe
N2  - We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructures. Spatial separation of the Nb detection layer from the laser excitation region allows for a background-free characterization of the laser-generated strain pulses. We clearly observe symmetric bipolar strain pulses if the excited TbFe2 surface terminates the sample and a decomposition of the strain wavepacket into an asymmetric bipolar and a unipolar pulse, if a SiO2 glass capping layer covers the excited TbFe2 layer. The inverse magnetostriction of the temporally separated unipolar strain pulses in this sample leads to a MOKE signal that linearly depends on the strain pulse amplitude measured through UXRD. Linear chain model simulations accurately predict the timing and shape of UXRD and MOKE signals that are caused by the strain reflections from multiple interfaces in the heterostructure.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 706 
KW  - Heterostructures
KW  - Magnetooptical effects
KW  - Metal oxides
KW  - Crystal lattices
KW  - Transition metals
KW  - Magnetism
KW  - Ultrafast X-ray diffraction
KW  - Lasers
KW  - Bragg peak
KW  - Phonons
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-428457
SN  - 1866-8372
IS  - 706
ER  -