Zobrazeno 1 - 10
of 532
pro vyhledávání: '"Gallmann, L."'
The coupling of light to electrical charge carriers in semiconductors is the foundation of many technological applications. Attosecond transient absorption spectroscopy measures simultaneously how excited electrons and the vacancies they leave behind
Externí odkaz:
http://arxiv.org/abs/2210.05465
Autor:
Volkov, M., Sato, S. A., Schlaepfer, F., Kasmi, L., Hartmann, N., Lucchini, M., Gallmann, L., Rubio, A., Keller, U.
Transition metals with their densely confined and strongly coupled valence electrons are key constituents of many materials with unconventional properties, such as high-Tc superconductors, Mott insulators and transition-metal dichalcogenides. Strong
Externí odkaz:
http://arxiv.org/abs/1811.00801
Autor:
Maurer, J., Willenberg, B., Mayer, B. W., Phillips, C. R., Gallmann, L., Danek, J., Klaiber, M., Hatsagortsyan, K. Z., Keitel, C. H., Keller, U.
Strong-field ionization and rescattering beyond the long-wavelength limit of the dipole approximation is studied with elliptically polarized mid-IR pulses. We have measured the full three-dimensional photoelectron momentum distributions (3D PMDs) wit
Externí odkaz:
http://arxiv.org/abs/1703.03283
Advances in the amplification and manipulation of ultrashort laser pulses has led to revolutions in several areas. Examples include chirped pulse amplification for generating high peak-power lasers, power-scalable amplification techniques, pulse shap
Externí odkaz:
http://arxiv.org/abs/1509.06284
Publikováno v:
Optics Express Vol.23, Issue 23, pp. 29502-29513 (2015)
We demonstrate a new attosecond pulse reconstruction modality which uses an algorithm that is derived from ptychography. In contrast to other methods, energy and delay sampling are not correlated, and as a result, the number of electron spectra to re
Externí odkaz:
http://arxiv.org/abs/1508.07714
Publikováno v:
Phys. Rev. Lett. 113, 243001 (2014)
We report the breakdown of the electric dipole approximation in the long-wavelength limit in strong-field ionization with linearly polarized few-cycle mid-infrared laser pulses at intensities on the order of 10$^{13}$ W/cm$^2$. Photoelectron momentum
Externí odkaz:
http://arxiv.org/abs/1408.2336
Autor:
Sabbar, M., Heuser, S., Boge, R., Lucchini, M., Carette, T., Lindroth, E., Gallmann, L., Cirelli, C., Keller, U.
We present measurements of single-photon ionization time delays between valence electrons of argon and neon using a coincidence detection technique that allows for the simultaneous measurement of both species under identical conditions. Taking into a
Externí odkaz:
http://arxiv.org/abs/1407.6623
Akademický článek
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Autor:
Locher, R., Castiglioni, L., Lucchini, M., Greif, M., Gallmann, L., Osterwalder, J., Hengsberger, M., Keller, U.
Publikováno v:
Optica, 2 (2015) 405
How quanta of energy and charge are transported on both atomic spatial and ultrafast time scales is at the heart of modern technology. Recent progress in ultrafast spectroscopy has allowed us to directly study the dynamical response of an electronic
Externí odkaz:
http://arxiv.org/abs/1403.5449
Autor:
Mansten, E., Dahlstrom, J. M., Mauritsson, J., Ruchon, T., LHuillier, A., Tate, J., Gaarde, M. B., Eckle, P., Guandalini, A., Holler, M., Schapper, F., Gallmann, L., Keller, U.
We report experimental measurements of high-order harmonic spectra generated in Ar using a carrier-envelope-offset (CEO) stabilized 12 fs, 800nm laser field and a fraction (less than 10%) of its second harmonic. Additional spectral peaks are observed
Externí odkaz:
http://arxiv.org/abs/0811.3550