Zobrazeno 1 - 10
of 181
pro vyhledávání: '"Reimann Klaus"'
The nonlinear polaronic response of electrons solvated in liquid 2-propanol is studied by two-dimensional terahertz spectroscopy. Solvated electrons with a concentration of c$_e \approx$ 800 $\mu$M are generated by femtosecond photoionization of alco
Externí odkaz:
http://arxiv.org/abs/2310.02689
Autor:
Elsaesser Thomas, Folpini Giulia, Somma Carmine, Reimann Klaus, Holtz Marcel, Hernandez Salvador Antonio-Andres, Hauf Christoph, Woerner Michael
Publikováno v:
EPJ Web of Conferences, Vol 205, p 04001 (2019)
The coupled lattice and charge dynamics connected with soft-mode excitations are mapped by nonlinear terahertz spectroscopy and ultrafast x-ray diffraction. Sub-picometer lattice displacements induce electron relocations over 100 pm in polycrystaline
Externí odkaz:
https://doaj.org/article/9c5344b2615645b2b9540a4c1e2fb437
Autor:
Folpini Giulia, Reimann Klaus, Woerner Michael, von Grafenstein Lorenz, Bock Martin, Griebner Uwe, Elsaesser Thomas
Publikováno v:
EPJ Web of Conferences, Vol 205, p 01014 (2019)
We present a novel few-cycle 5 um source delivering 75 fs pulses with 1.2 mJ energy at a 1 kHz repetition rate and its first applications for broadband pulse generation from the mid- to far-infrared.
Externí odkaz:
https://doaj.org/article/39034475509b456abe18ecaa63f507b4
Autor:
Woerner Michael, Somma Carmine, Reimann Klaus, Elsaesser Thomas, Brener Igal, Reno John L., Yang Yuanmu, Liu Peter Q.
Publikováno v:
EPJ Web of Conferences, Vol 205, p 05007 (2019)
Two-dimensional terahertz spectroscopy on an AlAs/GaAs nanostructure covered by field-enhancing dog-bone resonators shows signatures of coherent optical phonon amplification. Amplification is due to stimulated phonon emission by a terahertz-driven el
Externí odkaz:
https://doaj.org/article/88944540699b46beba11acc09b76d97f
Publikováno v:
Journal of Chemical Physics 2021
Nonlinear terahertz (THz) spectroscopy relies on the interaction of matter with few-cycle THz pulses of electric field amplitudes up to megavolts/centimeter (MV/cm). In condensed-phase molecular systems, both resonant interactions with elementary exc
Externí odkaz:
http://arxiv.org/abs/2112.03591
Autor:
Ghalgaoui, Ahmed, Fingerhut, Benjamin P., Reimann, Klaus, Elsaesser, Thomas, Woerner, Michael
Publikováno v:
Physical Review Letters 126, 097401 (2021)
The terahertz (THz) response of solvated electrons in liquid water is studied in nonlinear ultrafast pump-probe experiments. Free electrons with concentrations from c_e = 4 to 140 \times 10-6 moles/liter are generated by high-field THz or near-infrar
Externí odkaz:
http://arxiv.org/abs/2108.11378
Autor:
Ghalgaoui, Ahmed, Koll, Lisa-Marie, Schütte, Bernd, Fingerhut, Benjamin P., Reimann, Klaus, Woerner, Michael, Elsaesser, Thomas
Liquid water at ambient temperature displays ultrafast molecular motions and concomitant fluctuations of very strong electric fields originating from the dipolar H2O molecules. We show that such random intermolecular fields induce tunnel ionization o
Externí odkaz:
http://arxiv.org/abs/2008.10231
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2003 Apr 01. 100(7), 3870-3873.
Externí odkaz:
https://www.jstor.org/stable/3148706
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