Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Paschen Timo"'
Publikováno v:
Nanophotonics, Vol 10, Iss 14, Pp 3717-3721 (2021)
We demonstrate coherent control in photoemission from a gold needle tip using an ω − 2ω field composed of strong few-cycle laser pulses with a nearfield intensity of ∼4 TW/cm2. We obtain the nearfield intensity from electron energy spectra, sho
Externí odkaz:
https://doaj.org/article/bfacdf99b81b44d099b2f642070fe302
Autor:
Dienstbier, Philip, Seiffert, Lennart, Paschen, Timo, Liehl, Andreas, Leitenstorfer, Alfred, Fennel, Thomas, Hommelhoff, Peter
Publikováno v:
Nature 616, 702-706 (2023)
Solids exposed to intense electric fields release electrons through tunnelling. This fundamental quantum process lies at the heart of various applications, ranging from high brightness electron sources in DC operation to petahertz vacuum electronics
Externí odkaz:
http://arxiv.org/abs/2305.16185
Autor:
Kozák Martin, Higuchi Takuya, McNeur Joshua, Shiloh Roy, Heide Christian, Paschen Timo, Yousefi Peyman, Sturm Constanze, Li Ang, Illmer Johannes, Meier Stefan, Schönenberger Norbert, Dienstbier Philip, Tafel Alexander, Weber Philipp, Zimmermann Robert, Seidling Michael, Mittelbach Anna, Heimerl Jonas, Eckstein Timo, Hundhausen Martin, Ristein Jürgen, Hommelhoff Peter
Publikováno v:
EPJ Web of Conferences, Vol 205, p 08009 (2019)
New ways of controlling quasi-free and free electrons by means of phase-controlled ultrashort laser pulses are demonstrated: from strong-field physics in the conducting 2-d material graphene and at the surface of nanostructures, to laser acceleration
Externí odkaz:
https://doaj.org/article/6f1e6eb3c694457ea2e3c48a6a05bf6c
Autor:
Paschen Timo, Förster Michael, Krüger Michael, Lemell Christoph, Wachter Georg, Libisch Florian, Madlener Thomas, Burgdörfer Joachim, Hommelhoff Peter
Publikováno v:
EPJ Web of Conferences, Vol 205, p 05004 (2019)
We demonstrate that multi-photon photoemission including above-threshold multiphoton orders from a nanotip can be coherently controlled with the optical phase between two light fields. By focusing 74 fs drive pulses at 1560 nm and their second harmon
Externí odkaz:
https://doaj.org/article/6c7331bb420c46d4b9ed3e55bce19c62
We demonstrate coherent control of photoemission from a gold needle tip using a two-color laser field. The relative phase between a fundamental field and its second harmonic imprints a strong modulation on the emitted photocurrent with up to 96.5 % c
Externí odkaz:
http://arxiv.org/abs/2105.05577
Autor:
Schötz, Johannes, Mitra, Sambit, Fuest, Harald, Neuhaus, Marcel, Okell, William A., Förster, Michael, Paschen, Timo, Ciappina, Marcelo F., Yanagisawa, Hirofumi, Wnuk, Pawel, Hommelhoff, Peter, Kling, Matthias F.
Publikováno v:
Physical Review A 97.1 (2018): 013413
Transient near-fields around metallic nanotips drive many applications, including the generation of ultrafast electron pulses and their use in electron microscopy. We have investigated the electron emission from a gold nanotip driven by mid-infrared
Externí odkaz:
http://arxiv.org/abs/1905.06079
Akademický článek
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We investigate the process of phase-controlled high-order above-threshold photoemission from sharp metallic nanotips under bichromatic laser fields. Experimental photoelectron spectra resulting from two-color excitation with a moderately intense near
Externí odkaz:
http://arxiv.org/abs/1802.04553
Autor:
Paschen, Timo, Förster, Michael, Krüger, Michael, Lemell, Christoph, Wachter, Georg, Libisch, Florian, Madlener, Thomas, Burgdörfer, Joachim, Hommelhoff, Peter
Publikováno v:
J. Mod. Opt. 64, 10-11, 1054-1060 (2017)
In this article we present coherent control of above-threshold photoemission from a tungsten nanotip achieving nearly perfect modulation. Depending on the pulse delay between fundamental (1560 nm) and second harmonic (780 nm) pulses of a femtosecond
Externí odkaz:
http://arxiv.org/abs/1707.03849
Autor:
Förster, Michael, Paschen, Timo, Krüger, Michael, Lemell, Christoph, Wachter, Georg, Libisch, Florian, Madlener, Thomas, Burgdörfer, Joachim, Hommelhoff, Peter
Publikováno v:
Phys. Rev. Lett. 117, 217601 (2016)
We demonstrate coherent control of multiphoton and above-threshold photoemission from a single solid-state nanoemitter driven by a fundamental and a weak second harmonic laser pulse. Depending on the relative phase of the two pulses, electron emissio
Externí odkaz:
http://arxiv.org/abs/1603.01516