William Okell
TitleCited byYear
Attosecond physics at the nanoscale
MF Ciappina, JA Pérez-Hernández, AS Landsman, WA Okell, ...
Reports on Progress in Physics 80 (5), 054401, 2017
1372017
Invited review article: technology for attosecond science
F Frank, C Arrell, T Witting, WA Okell, J McKenna, JS Robinson, ...
Review of Scientific Instruments 83 (7), 52, 2012
772012
Characterization of high-intensity sub-4-fs laser pulses using spatially encoded spectral shearing interferometry
T Witting, F Frank, CA Arrell, WA Okell, JP Marangos, JWG Tisch
Optics letters 36 (9), 1680-1682, 2011
732011
Enhanced high-order-harmonic generation in a carbon ablation plume
RA Ganeev, T Witting, C Hutchison, F Frank, PV Redkin, WA Okell, DY Lei, ...
Physical Review A 85 (1), 015807, 2012
582012
Attosecond nanoscale near-field sampling
B Förg, J Schötz, F Süßmann, M Förster, M Krüger, B Ahn, WA Okell, ...
Nature communications 7, 11717, 2016
522016
High-order harmonic generation in graphite plasma plumes using ultrashort laser pulses: a systematic analysis of harmonic radiation and plasma conditions
RA Ganeev, C Hutchison, T Witting, F Frank, WA Okell, A Zaïr, S Weber, ...
Journal of Physics B: Atomic, Molecular and Optical Physics 45 (16), 165402, 2012
472012
Stable generation of high-order harmonics of femtosecond laser radiation from laser produced plasma plumes at 1 kHz pulse repetition rate
C Hutchison, RA Ganeev, T Witting, F Frank, WA Okell, JWG Tisch, ...
Optics letters 37 (11), 2064-2066, 2012
462012
Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti: sapphire laser pulses
RA Ganeev, C Hutchison, A Zaïr, T Witting, F Frank, WA Okell, JWG Tisch, ...
Optics express 20 (1), 90-100, 2012
432012
Sub-4-fs laser pulse characterization by spatially resolved spectral shearing interferometry and attosecond streaking
T Witting, F Frank, WA Okell, CA Arrell, JP Marangos, JWG Tisch
Journal of Physics B: Atomic, Molecular and Optical Physics 45 (7), 074014, 2012
402012
Synchronized pulses generated at 20 eV and 90 eV for attosecond pump–probe experiments
D Fabris, T Witting, WA Okell, DJ Walke, P Matia-Hernando, J Henkel, ...
Nature Photonics 9 (6), 383, 2015
382015
High-order harmonic generation in fullerenes using few-and multi-cycle pulses of different wavelengths
RA Ganeev, C Hutchison, T Witting, F Frank, S Weber, WA Okell, ...
JOSA B 30 (1), 7-12, 2013
382013
Isolated sub-fs XUV pulse generation in Mn plasma ablation
RA Ganeev, T Witting, C Hutchison, F Frank, M Tudorovskaya, M Lein, ...
Optics express 20 (23), 25239-25248, 2012
352012
Carrier-envelope phase stability of hollow fibers used for high-energy few-cycle pulse generation
WA Okell, T Witting, D Fabris, D Austin, M Bocoum, F Frank, A Ricci, ...
Optics letters 38 (19), 3918-3921, 2013
302013
Temporal broadening of attosecond photoelectron wavepackets from solid surfaces
WA Okell, T Witting, D Fabris, CA Arrell, J Hengster, S Ibrahimkutty, ...
Optica 2 (4), 383-387, 2015
242015
A simple electron time-of-flight spectrometer for ultrafast vacuum ultraviolet photoelectron spectroscopy of liquid solutions
CA Arrell, J Ojeda, M Sabbar, WA Okell, T Witting, T Siegel, Z Diveki, ...
Review of scientific instruments 85 (10), 103117, 2014
242014
Spatial coherence measurements of non-resonant and resonant high harmonics generated in laser ablation plumes
RA Ganeev, Z Abdelrahman, F Frank, T Witting, WA Okell, D Fabris, ...
Applied Physics Letters 104 (2), 021122, 2014
222014
Attosecond-controlled photoemission from metal nanowire tips in the few-electron regime
B Ahn, J Schötz, M Kang, WA Okell, S Mitra, B Förg, S Zherebtsov, ...
Apl Photonics 2 (3), 036104, 2017
132017
Reconstruction of nanoscale near fields by attosecond streaking
J Schötz, B Förg, M Förster, WA Okell, MI Stockman, F Krausz, ...
IEEE Journal of Selected Topics in Quantum Electronics 23 (3), 77-87, 2016
112016
Nonadiabatic ponderomotive effects in photoemission from nanotips in intense midinfrared laser fields
J Schötz, S Mitra, H Fuest, M Neuhaus, WA Okell, M Förster, T Paschen, ...
Physical Review A 97 (1), 013413, 2018
72018
Extended homogeneous nanoripple formation during interaction of high-intensity few-cycle pulses with a moving silicon wafer
RA Ganeev, DY Lei, C Hutchison, T Witting, F Frank, WA Okell, ...
Applied Physics A 112 (2), 457-462, 2013
72013
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Articles 1–20