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26 papers
Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
Tenio Popmintchev, Ming-Chang Chen, Dimitar Popmintchev +17
High harmonic generation traditionally combines ~100 near-infrared laser photons, to generate bright, phase matched, extreme ultraviolet beams when the emission from many atoms add…
Rapid-scan nonlinear time-resolved spectroscopy over arbitrary delay intervals
Tobias Flöry, Vinzenz Stummer, Justinas Pupeikis +9
Femtosecond dual-comb lasers have revolutionized linear Fourier-domain spectroscopy by offering a rapid motion-free, precise and accurate measurement mode with easy registration of…
Tracing spatial confinement in semiconductor quantum dots by high-order harmonic generation
H. N. Gopalakrishna, R. Baruah, C. Hünecke +20
We report here on results of experimental-theoretical investigation of high-order harmonic generation (HHG) in layers of CdSe semiconductor quantum dots of different sizes and a re…
Ionization rate and plasma dynamics at 3.9 micron femtosecond photoionization of air
Adam Patel, Claudia Gollner, Rokas Jutas +5
The introduction of mid-IR optical parametric chirped pulse amplifiers (OPCPAs) has catalyzed interest in multi-millijoule, infrared femtosecond pulse-based filamentation. As tunne…
Self-trapping and switching of solitonic pulses in mismatched dual-core highly nonlinear fibers
N. V. Hung, L. X. T. Tai, M. Longobucco +7
We investigate experimentally and theoretically effects of the inter-core propagation mismatch on nonlinear switching in dual-core high-index-contrast soft-glass optical fibers. In…
High contrast all-optical spectrally distributed switching of femtosecond pulses in soft glass dual-core optical fiber
Mattia Longobucco, Ignas Astrauskas, Audrius Pugžlys +5
All-optical switching of 77 fs pulses centered at 1560 nm, driven by 270 fs, 1030 nm pulses in a dual-core optical fiber exhibiting high index contrast is presented. The fiber is m…