All-optical spatio-temporal control of electron emission from SiO2 nanospheres with femtosecond two-color laser fields

Field localization by nanostructures illuminated with laser pulses of well-defined waveform enables spatio-temporal tailoring of the near-fields for sub-cycle control of electron dynamics at the nanoscale. Here, we apply intense linearly-polarized two-color laser pulses for all-optical control of the highest energy electron emission from SiO2 nanoparticles. For the size regime where light propagation effects become important, we demonstrate the possibility to control the preferential emission angle of a considerable fraction of the fastest electrons by varying the relative phase of the two-color field. Trajectory based semi-classical simulations show that for the investigated nanoparticle size range the directional steering can be attributed to the two-color effect on the electron trajectories, while the accompanied modification of the spatial distribution of the ionization rate on the nanoparticle surface has only a minor effect

Towards a unified approach to detection of faults and cyber-attacks in industrial installations

© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other worksThis paper investigates enhancing the ability to detect cyber-attacks by using information and methods related to fault detection. An experimental stand, and an associated simulator have been constructed to enable tests of combined cyber attacks and faults in industrial processes, and, possibly, to distinguish between them. Some scenarios of cyber attacks have been presented, analysed theoretically and then tested on the simulator, demonstrating that detection of cyber attacks by this method is possible.Peer ReviewedPostprint (author's final draft

Suppression of individual peaks in two-colour high harmonic generation

This work investigates the suppression of individual harmonics, simultaneously affecting specific even and odd orders in the high-harmonic spectra generated by strongly tailored, two-colour, multi-cycle laser pulses in neon. The resulting spectra are systematically studied as a function of the electric-field shape in a symmetry-broken ($\omega$-$2\omega$) and symmetry-preserved ($\omega$-$3\omega$) configuration. The peak suppression is reproduced by macroscopic strong-field approximation calculations and is found to be unique to symmetry-broken fields ($\omega$-$2\omega$). Additionally, semi-classical calculations further corroborate the observation and reveal their underlying mechanism, where a nontrivial spectral interference between subsequent asymmetric half-cycles is found to be responsible for the suppression

All-optical spatio-temporal control of electron emission from SiO2 nanospheres with femtosecond two-color laser fields

Field localization by nanostructures illuminated with laser pulses of well-defined waveform enables spatio-temporal tailoring of the near-fields for sub-cycle control of electron dynamics at the nanoscale. Here, we apply intense linearly-polarized two-color laser pulses for all-optical control of the highest energy electron emission from SiO2 nanoparticles. For the size regime where light propagation effects become important, we demonstrate the possibility to control the preferential emission angle of a considerable fraction of the fastest electrons by varying the relative phase of the two-color field. Trajectory based semi-classical simulations show that for the investigated nanoparticle size range the directional steering can be attributed to the two-color effect on the electron trajectories, while the accompanied modification of the spatial distribution of the ionization rate on the nanoparticle surface has only a minor effect. © 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaf

All-optical spatio-temporal control of electron emission from SiO2 nanospheres with femtosecond two-color laser fields

Field localization by nanostructures illuminated with laser pulses of well-defined waveform enables spatio-temporal tailoring of the near-fields for sub-cycle control of electron dynamics at the nanoscale. Here, we apply intense linearly-polarized two-color laser pulses for all-optical control of the highest energy electron emission from SiO2 nanoparticles. For the size regime where light propagation effects become important, we demonstrate the possibility to control the preferential emission angle of a considerable fraction of the fastest electrons by varying the relative phase of the two-color field. Trajectory based semi-classical simulations show that for the investigated nanoparticle size range the directional steering can be attributed to the two-color effect on the electron trajectories, while the accompanied modification of the spatial distribution of the ionization rate on the nanoparticle surface has only a minor effect.11Ysciescopu

Chamber Music Recital II

Violin Sonata in E-minor, K. 304 / W. A. Mozart; Summer Music for Woodwind Quintet, Op. 31 / Samuel Barber; Spectra (2016) / James Naigus; Piano Trio no. 1, Op. 8, I. Allegro con brio / Johannes Brahm

Chamber Music Recital II

Violin Sonata in E-minor, K. 304 / W. A. Mozart; Summer Music for Woodwind Quintet, Op. 31 / Samuel Barber; Spectra (2016) / James Naigus; Piano Trio no. 1, Op. 8, I. Allegro con brio / Johannes Brahm

Chamber Music Recital III

Horn Trio, Op. 40, I. Andante, II. Scherzo. Allegro / Johannes Brahms; Piano Trio in D Major, Hob. XV: 16, I. Allegro / Joseph Haydn; Kleine Kammermusik, Op. 24, No. 2, I. Lustig. Mäßig schnell Viertel, II. Walzer: Durchweg sehr leise, IV. Schnelle Viertel / Paul Hindemith; Violin Sonata No. 2, Op. 100, I. Allegro amabile, II. Andante tranquillo - Vivace / Johannes Brahm

Chamber Music Recital III

Horn Trio, Op. 40, I. Andante, II. Scherzo. Allegro / Johannes Brahms; Piano Trio in D Major, Hob. XV: 16, I. Allegro / Joseph Haydn; Kleine Kammermusik, Op. 24, No. 2, I. Lustig. Mäßig schnell Viertel, II. Walzer: Durchweg sehr leise, IV. Schnelle Viertel / Paul Hindemith; Violin Sonata No. 2, Op. 100, I. Allegro amabile, II. Andante tranquillo - Vivace / Johannes Brahm