Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Peter Hommelhoff"'
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
Autor:
Benedikt Hermann, Urs Haeusler, Gyanendra Yadav, Adrian Kirchner, Thomas Feurer, Carsten Welsch, Peter Hommelhoff, Rasmus Ischebeck
Publikováno v:
Hermann, Benedikt; Haeusler, Urs; Yadav, Gyanendra; Kirchner, Adrian; Feurer, Thomas; Welsch, Carsten; Hommelhoff, Peter; Ischebeck, Rasmus (2022). Inverse-Designed Narrowband THz Radiator for Ultrarelativistic Electrons. ACS Photonics, 9(4), pp. 1143-1149. American Chemical Society 10.1021/acsphotonics.1c01932
ACS PHOTONICS
ACS PHOTONICS
THz radiation finds various applications in science and technology. Pump-probe experiments at free-electron lasers typically rely on THz radiation generated by optical rectification of ultrafast laser pulses in electro-optic crystals. A compact and c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7b2b7b5d31b2d834325eb96a5105775
https://boris.unibe.ch/167611/1/acsphotonics.1c01932.pdf
https://boris.unibe.ch/167611/1/acsphotonics.1c01932.pdf
Publikováno v:
Proceedings of the International Vacuum Nanoelectronics Conference
2021 34th International Vacuum Nanoelectronics Conference (IVNC)
2021 34th International Vacuum Nanoelectronics Conference (IVNC)
Lanthanum hexaboride (LaB 6 ) nanowire emitters have been demonstrated to work as monochromatic ultrabright field emitters. A small atomic array consisting of only a few La atoms at the foremost (100) facet generates a stark contrast of the surroundi
The generation of radiation from free electrons passing a grating, known as Smith-Purcell radiation, finds various applications including non-destructive beam diagnostics and tunable light sources, ranging from terahertz towards X-rays. So far, the g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c02e56850a7fde968b08bf60737acdce
Autor:
Peter Hommelhoff, Yuya Morimoto
Publikováno v:
Physical Review Research. 2
The authors report quantum mechanical interference in the interaction between an ultrashort laser pulse and an electron beam occurring within a cycle of the optical field.
Publikováno v:
Physical Review B. 101
Nanometer-sharp objects coupled with femtosecond laser pulses find much current interest because they allow us to reach high spatiotemporal control -- like a needle tip enables the scanning tunneling microscope (STM). With two needles facing each oth
Autor:
Uwe Niedermayer, Norbert Schönenberger, Anna Mittelbach, Peyman Yousefi, Joshua McNeur, Ang Li, Peter Hommelhoff
Publikováno v:
The 22nd International Conference on Ultrafast Phenomena 2020.
We show that dielectric laser accelerators (DLA), photonic nano-structures illuminated by ultrashort laser pulses, can generate attosecond electron bunch trains of 280 as length and allow other complex phase-space manipulation.
Autor:
Peter Hommelhoff, Joshua McNeur, Uwe Niedermayer, Anna Mittelbach, Peyman Yousefi, Norbert Schönenberger
Publikováno v:
Physical Review Letters. 123
Dielectric laser acceleration is a versatile scheme to accelerate and control electrons with the help of femtosecond laser pulses in nanophotonic structures. We demonstrate here the generation of a train of electron pulses with individual pulse durat
Publikováno v:
Physical Review Letters. 123
We present femtosecond laser-induced electron emission from nanodiamond-coated tungsten tips. Based on the shortness of the femtosecond laser pulses, electrons can be photo-excited for wavelengths from the infrared (1932 nm) to the ultraviolet (235 n
Publikováno v:
Nature. 550:224-228
Ultrafast electron dynamics in solids under strong optical fields has recently found particular attention. In dielectrics and semiconductors, various light-field-driven effects have been explored, such as high-harmonic generation, sub-optical-cycle i