Imperial College London

DrTobiasWitting

Faculty of Natural SciencesDepartment of Physics

Academic Visitor
 
 
 
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Contact

 

+44 (0)20 7594 7520t.witting Website

 
 
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Location

 

6M73Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

71 results found

Barillot TR, Matia-Hernando P, Greening D, Walke DJ, Witting T, Frasinski LJ, Marangos JP, Tisch JWGet al., 2017, Towards XUV pump-probe experiments in the femtosecond to sub-femtosecond regime: New measurement of the helium two-photon ionization cross-section, CHEMICAL PHYSICS LETTERS, Vol: 683, Pages: 38-42, ISSN: 0009-2614

JOURNAL ARTICLE

Ciappina MF, Perez-Hernandez JA, Landsman AS, Okell WA, Zherebtsov S, Foerg B, Schoetz J, Seiffert L, Fennel T, Shaaran T, Zimmermann T, Chacon A, Guichard R, Zaier A, Tisch JWG, Marangos JP, Witting T, Braun A, Maier SA, Roso L, Krueger M, Hommelhoff P, Kling MF, Krausz F, Lewenstein Met al., 2017, Attosecond physics at the nanoscale, Publisher: IOP PUBLISHING LTD

WORKING PAPER

Furch FJ, Witting T, Giree A, Luan C, Schell F, Arisholm G, Schulz CP, Vrakking MJJet al., 2017, CEP-stable few-cycle pulses with more than 190 mu J of energy at 100 kHz from a noncollinear optical parametric amplifier, OPTICS LETTERS, Vol: 42, Pages: 2495-2498, ISSN: 0146-9592

JOURNAL ARTICLE

Hyyti J, Escoto E, Steinmeyer G, Witting Tet al., 2017, Interferometric time-domain ptychography for ultrafast pulse characterization, OPTICS LETTERS, Vol: 42, Pages: 2185-2188, ISSN: 0146-9592

JOURNAL ARTICLE

Mercer IP, Witting T, Driver T, Cogdell RJ, Marangos JP, Tisch JWGet al., 2017, Angle-resolved coherent wave mixing using a 4 fs ultra-broad bandwidth laser, OPTICS LETTERS, Vol: 42, Pages: 859-862, ISSN: 0146-9592

JOURNAL ARTICLE

Raabe N, Feng T, Witting T, Demircan A, Bree C, Steinmeyer Get al., 2017, Role of Intrapulse Coherence in Carrier-Envelope Phase Stabilization, PHYSICAL REVIEW LETTERS, Vol: 119, ISSN: 0031-9007

JOURNAL ARTICLE

Austin DR, Witting T, Weber SJ, Ye P, Siegel T, Matia-Hernando P, Johnson AS, Tisch JWG, Marangos JPet al., 2016, Spatio-temporal characterization of intense few-cycle 2 mu m pulses, OPTICS EXPRESS, Vol: 24, Pages: 24786-24798, ISSN: 1094-4087

JOURNAL ARTICLE

Austin DR, Witting T, Ye P, Tisch JWG, Marangos Jet al., 2016, Temporal Characterization of Two Octave Hollow Fiber Supercontinuum

© OSA 2016. We measure the temporal profile of a 600 μJ hollow fiber supercontinuum spanning 640-2600 nm. At the fiber output, we observe extreme self-steepening and self-compression. The pulse is suitable for multi-channel compression to the sub-cycle regime.

CONFERENCE PAPER

Fan G, Balciunas T, Fourcade-Dutin C, Haessler S, Voronin AA, Zheltikov AM, Gerome F, Benabid F, Baltuska A, Witting Tet al., 2016, X-SEA-F-SPIDER characterization of over octave spanning pulses in the infrared range, OPTICS EXPRESS, Vol: 24, Pages: 12713-12729, ISSN: 1094-4087

JOURNAL ARTICLE

Schuette B, Ye P, Patchkovskii S, Austin DR, Brahms C, Strueber C, Witting T, Ivanov MY, Tisch JWG, Marangos JPet al., 2016, Strong-field ionization of clusters using two-cycle pulses at 1.8 mu m, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Witting T, Austin DR, Barillot T, Greening D, Matia-Hernando P, Walke D, Marangos JP, Tisch WGet al., 2016, Self-referenced characterization of space-time couplings in near-single-cycle laser pulses, OPTICS LETTERS, Vol: 41, Pages: 2382-2385, ISSN: 0146-9592

JOURNAL ARTICLE

Witting T, Greening D, Walke D, Matia-Hernando P, Barillot T, Marangos JP, Tisch JWGet al., 2016, Time-domain ptychography of over-octave-spanning laser pulses in the single-cycle regime, OPTICS LETTERS, Vol: 41, Pages: 4218-4221, ISSN: 0146-9592

JOURNAL ARTICLE

Wyatt AS, Witting T, Schiavi A, Fabris D, Matia-Hernando P, Walmsley IA, Marangos JP, Tisch JWGet al., 2016, Attosecond sampling of arbitrary optical waveforms, OPTICA, Vol: 3, Pages: 303-310, ISSN: 2334-2536

JOURNAL ARTICLE

Balciunas T, Fan G, Haessler S, Fourcade-Dutin C, Witting T, Voronin AA, Zheltikov AM, Gerome F, Paulus GG, Baltuska A, Benabid Fet al., 2015, Strong Field Applications of Gigawatt Self-compressed Pulses from a Kagome Fiber, 19th International Conference on Ultrafast Phenomena, Publisher: SPRINGER-VERLAG BERLIN, Pages: 11-15, ISSN: 0930-8989

CONFERENCE PAPER

Balciunas T, Fourcade-Dutin C, Fan G, Witting T, Voronin AA, Zheltikov AM, Gerome F, Paulus GG, Baltuska A, Benabid Fet al., 2015, A strong-field driver in the single-cycle regime based on self-compression in a kagome fibre, Nature Communications, Vol: 6, ISSN: 2041-1723

JOURNAL ARTICLE

Fabris D, Holgado W, Silva F, Witting T, Tisch JWG, Crespo Het al., 2015, Single-shot implementation of dispersion-scan for the characterization of ultrashort laser pulses, OPTICS EXPRESS, Vol: 23, Pages: 32803-32808, ISSN: 1094-4087

JOURNAL ARTICLE

Fabris D, Witting T, Okell WA, Walke DJ, Matia-Hernando P, Henkel J, Barillot TR, Lein M, Marangos JP, Tisch JWGet al., 2015, Synchronized pulses generated at 20 eV and 90 eV for attosecond pump-probe experiments, NATURE PHOTONICS, Vol: 9, Pages: 383-+, ISSN: 1749-4885

JOURNAL ARTICLE

Fan G, Balciunas T, Haessler S, Fourcade-Dutin C, Witting T, Voronin AA, Zheltikov AM, Gerome F, Paulus GG, Baltuska A, Benabid Fet al., 2015, A compact single cycle driver for strong field applications based on a self-compression in a Kagome fiber, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020

CONFERENCE PAPER

Haessler S, Balciunas T, Fan G, Witting T, Squibb R, Chipperfield L, Zair A, Andriukaitis G, Pugzlys A, Tisch JWG, Marangos JP, Baltuska Aet al., 2015, Optimization of Quantum Trajectories Driven by Strong-Field Waveforms, 19th International Conference on Ultrafast Phenomena, Publisher: SPRINGER-VERLAG BERLIN, Pages: 72-77, ISSN: 0930-8989

CONFERENCE PAPER

Okell WA, Witting T, Fabris D, Arrell CA, Hengster J, Ibrahimkutty S, Seiler A, Barthelmess M, Stankov S, Lei DY, Sonnefraud Y, Rahmani M, Uphues T, Maier SA, Marangos JP, Tisch JWGet al., 2015, Temporal broadening of attosecond photoelectron wavepackets from solid surfaces, OPTICA, Vol: 2, Pages: 383-387, ISSN: 2334-2536

JOURNAL ARTICLE

Arrell CA, Ojeda J, Sabbar M, Okell WA, Witting T, Siegel T, Diveki Z, Hutchinson S, Gallmann L, Keller U, van Mourik F, Chapman RT, Cacho C, Rodrigues N, Turcu ICE, Tisch JWG, Springate E, Marangos JP, Chergui Met al., 2014, A simple electron time-of-flight spectrometer for ultrafast vacuum ultraviolet photoelectron spectroscopy of liquid solutions, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 85, ISSN: 0034-6748

JOURNAL ARTICLE

Austin DR, Weber SJ, Matía-Hernando P, Witting T, Siegel T, Tisch JWG, Marangos JPet al., 2014, Generation and characterization of few-cycle phase-controlled 1.7μm pulses

We generate 9 fs 1.7 μm 360 μJ pulses by hollow fiber compression. Complete 3D simulations show good agreement across a range of fiber pressures and elucidate the role of shock formation and Kerr effect saturation.

CONFERENCE PAPER

Ganeev RA, Abdelrahman Z, Frank F, Witting T, Okell WA, Fabris D, Hutchison C, Marangos JP, Tisch JWGet al., 2014, Spatial coherence measurements of non-resonant and resonant high harmonics generated in laser ablation plumes, APPLIED PHYSICS LETTERS, Vol: 104, ISSN: 0003-6951

JOURNAL ARTICLE

Gerome F, Balciunas T, Fourcade-Dutin C, Fan G, Witting T, Voronin AA, Zheltikov AM, Paulus GC, Baltuska A, Benabid Fet al., 2014, Self-compression to sub-cycle regime in kagome hollow-core photonic crystal fiber, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020

CONFERENCE PAPER

Haessler S, Balciunas T, Fan G, Andriukaitis G, Pugzlys A, Baltuska A, Witting T, Squibb R, Zair A, Tisch JWG, Marangos JP, Chipperfield LEet al., 2014, Optimization of Quantum Trajectories Driven by Strong-Field Waveforms, PHYSICAL REVIEW X, Vol: 4, ISSN: 2160-3308

JOURNAL ARTICLE

Okell WA, Fabris D, Rahmani M, Sonnefraud Y, Hengster J, Walke D, Lei DY, Maier SA, Uphues T, Witting T, Marangos JP, Tisch JWGet al., 2014, Attosecond streaking on gold films

We demonstrate attosecond streaking on thin Au films. This is the first streaking measurement on Au, and also the first demonstration of streaking on a non-crystalline, non-UHVprepared sample. © OSA 2014.

CONFERENCE PAPER

Okell WA, Witting T, Fabris D, Austin DR, Bacoum M, Ricci A, Jullien A, Walke D, Marangos JP, Lopez-Martens R, Tisch JWGet al., 2014, Carrier-envelope phase performance of hollow-fiber pulse compression for high-energy, single-cycle pulse generation

We investigate the performance and carrier-envelope phase (CEP) stability of hollowfiber pulse compression for high-energy, close to single-cycle duration pulses. We find the onset of an ionization-induced CEP instability, which saturates above 1.25mJ.

CONFERENCE PAPER

Fabris D, Okell WA, Walke D, Witting T, Marangos JP, Tisch JWGet al., 2013, Simultaneous VUV and XUV pulse generation and characterization for attosecond pump probe experiments

We report the generation and characterization of isolated attosecond XUV andVUV pulses generated simultaneously via HHG driven by few-cycle pulses using anin-line dual gas target system. One gas jet target was operated with Kr gasthat optimized HHG in the 15-25 eV photon energy range (VUV), whilst the secondgas jet target was operated in Ne gas to optimize the high harmonic generationaround 90 eV (XUV). Appropriate filters were used to isolate the requiredspectral components to synthesize isolated pulses. Sn and In filters were usedfor the VUV region while a Zr filter was used for the XUV. We characterizedboth the XUV and VUV pulses independently using the attosecond streakingtechnique and the LSGPA retrieval algorithm obtaining a 1.7$\pm$0.2 fs pulseusing the In filter and a 616$\pm$50 as pulse using Sn, while preserving a266$\pm$10 as isolated XUV pulse.

JOURNAL ARTICLE

Fabris D, Witting T, Henkel J, Frank F, Okell WA, Abdelrahman Z, Lein M, Marangos JP, Tisch JWGet al., 2013, Sub-fs pulse generation and characterisation in the VUV, Conference on Lasers and Electro-Optics Europe & International Quantum Electronics Conference (CLEO/Europe-IQEC), Publisher: IEEE

CONFERENCE PAPER

Ganeev RA, Hutchison C, Witting T, Frank F, Weber S, Okell WA, Fiordilino E, Cricchio D, Persico F, Zair A, Tisch JWG, Marangos JPet al., 2013, High-order harmonic generation in fullerenes using few- and multi-cycle pulses of different wavelengths, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 30, Pages: 7-12, ISSN: 0740-3224

JOURNAL ARTICLE

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