Zobrazeno 1 - 10 of 176 pro vyhledávání: '"G. Tisch"'
1
Akademický článek
Sub-10-fs observation of bound exciton formation in organic optoelectronic devices
Autor: Marios Maimaris, Allan J. Pettipher, Mohammed Azzouzi, Daniel J. Walke, Xijia Zheng, Andrei Gorodetsky, Yifan Dong, Pabitra Shakya Tuladhar, Helder Crespo, Jenny Nelson, John W. G. Tisch, Artem A. Bakulin
Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
Ultrafast action spectroscopies of organic optoelectronic devices reveal that the formation of bound exciton state occurs as fast as 10 fs. Excitons having excess energy can dissociate spontaneously within 50-fs before acquiring bound character.
Externí odkaz: https://doaj.org/article/7b33840f609d4374ad791174c86aadd5
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2
Akademický článek
Rapid retrieval of femtosecond and attosecond pulses from streaking traces using convolutional neural networks
Autor: G Hajivassiliou, M Kassapis, J W G Tisch
Publikováno v: New Journal of Physics, Vol 25, Iss 9, p 093024 (2023)
Attosecond streaking is a powerful and versatile technique that allows the full-field characterisation of femtosecond to attosecond optical pulses. It has been instrumental in the verification of attosecond pulse generation and probing of ultrafast d
Externí odkaz: https://doaj.org/article/a0a316b05bd94a7fba638d19000ae766
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3
Akademický článek
Correlation-Driven Transient Hole Dynamics Resolved in Space and Time in the Isopropanol Molecule
Autor: T. Barillot, O. Alexander, B. Cooper, T. Driver, D. Garratt, S. Li, A. Al Haddad, A. Sanchez-Gonzalez, M. Agåker, C. Arrell, M. J. Bearpark, N. Berrah, C. Bostedt, J. Bozek, C. Brahms, P. H. Bucksbaum, A. Clark, G. Doumy, R. Feifel, L. J. Frasinski, S. Jarosch, A. S. Johnson, L. Kjellsson, P. Kolorenč, Y. Kumagai, E. W. Larsen, P. Matia-Hernando, M. Robb, J.-E. Rubensson, M. Ruberti, C. Sathe, R. J. Squibb, A. Tan, J. W. G. Tisch, M. Vacher, D. J. Walke, T. J. A. Wolf, D. Wood, V. Zhaunerchyk, P. Walter, T. Osipov, A. Marinelli, T. J. Maxwell, R. Coffee, A. A. Lutman, V. Averbukh, K. Ueda, J. P. Cryan, J. P. Marangos
Publikováno v: Physical Review X, Vol 11, Iss 3, p 031048 (2021)
The possibility of suddenly ionized molecules undergoing extremely fast electron hole (or hole) dynamics prior to significant structural change was first recognized more than 20 years ago and termed charge migration. The accurate probing of ultrafast
Externí odkaz: https://doaj.org/article/9125dfe7b71b4902b383d1eaa3c5b4f5
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5
Photoemission from non-polar aromatic molecules in the gas and liquid phase
Autor: Richard T. Chapman, J. Ojeda, Jakob Grilj, Petr Slavíček, Tobias Witting, John W. G. Tisch, S Yap, Emma Springate, T. Siegel, Christopher Arrell, Jonathan P. Marangos, Z. Diveki, Luca Longetti, F. van Mourik, Cephise Cacho, Lukas Miseikis, Alvaro Sanchez-Gonzalez, M Randulová, Lars Mewes, Majed Chergui
Publikováno v: Physical Chemistry Chemical Physics. 22:3965-3974
The photoelectron spectra of both liquid and gas phase aromatic molecules are reported. The spectra were obtained using a 34.1 eV source produced by high harmonic generation and analysed with the help of high-level ab initio simulations using the ref
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63635ca351e5536ecef80b84ebeee7b3
https://doi.org/10.1039/c9cp06799j
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6
Sub-10fs Photocurrent and Photoluminescence Action Spectroscopies of Organic Optoelectronic Devices Reveals Ultrafast Formation of Bound Excitonic States
Autor: Marios Maimaris, Allan J. Pettipher, Mohammed Azzouzi, Daniel J. Walke, Xijia Zheng, Andrei Gorodetsky, Yifan Dong, Pabitra Shakya Tuladhar, Helder Crespo, Jenny Nelson, John W. G. Tisch, Artem A. Bakulin
Publikováno v: The International Conference on Ultrafast Phenomena (UP) 2022.
We apply ultrafast pump-push-photocurrent and pump-push-photoluminescence spectroscopies to polyfluorene organic diode to track in time the bound exciton formation. ‘Cold’-excitons become bound within 10-fs while ‘hot’-excitons can dissociate
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e84adf4fe7e2ddf96c0530d7b19c48a
https://doi.org/10.1364/up.2022.th5a.2
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7
Direct on-target temporal measurement of high-intensity laser pulses during laser-matter interactions
Autor: Tobias Witting, Helder Crespo, John W. G. Tisch, Miguel Miranda, Miguel Canhota
Publikováno v: High Power Lasers and Applications.
We present a new dispersion-scan-based technique for the temporal characterization of ultrashort laser pulses directly on target and at full laser power. We demonstrate the technique by measuring intense 4-fs pulses in conditions optimized for HHG.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85ebb39935576e0d9518efdaded6e32b
https://doi.org/10.1117/12.2595718
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8
A history of high-power laser research and development in the United Kingdom
Autor: Richard O. Moore, Justin Wark, Colin E. Webb, Peter E. Dyer, Colin N. Danson, Nadeem H. Rizvi, Wayne Harris, Nicholas Hopps, G.J. Pert, Janet Hull, John W. G. Tisch, Zheng-Ming Sheng, Chris Edwards, David Hunt, Paul Ewart, David Hillier, Anthony W. Parker, Robert J. Collins, Simon M. Hooker, Ceri Brenner, John Littlechild, Ken S. Lipton, Abby Littlechild, Laurence Devereux, Neal Croxford, Adrian Knowles, Mark Kempenaars, David C. Hanna, Trevor Winstone, Geoff H. C. New, Dino A. Jaroszynski, A. E. Bucker Dangor, Sir Peter L. Knight, Gary Thomas, Michael J. Norman, Dave Willford, William Eugene Martin, Clive Morrison, Anthony Dymoke-Bradshaw, Malcolm White, S. Mark Wiggins, Zulfikar Najmudin, John M. Girkin, Ted Paine, Peter Maggs, Allister I. Ferguson, Chris Pietraszewski, John R. M. Barr, Roy Taylor, Christopher Spindloe, Ciaran Lewis, Paul McKenna, Helmut Kessler, Nigel Seddon, Steve Knight, Thomas Bett, Roland Smith, Andrew Randewich, David Bowley, David Slater, Rory R. Penman, Denis R. Hall, Stuart Mangles, C. J. Hooker, Peter Blyth, Graeme P. A. Malcolm, David Neely
Publikováno v: High Power Laser Science and Engineering, 2021, Vol.9, pp.e18 [Peer Reviewed Journal]
The first demonstration of laser action in ruby was made in 1960 by T. H. Maiman of Hughes Research Laboratories, USA. Many laboratories worldwide began the search for lasers using different materials, operating at different wavelengths. In the UK, a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c82046a5da323f0fda8e03df24e59f9
http://hdl.handle.net/10044/1/89337
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9
Correlation-Driven Transient Hole Dynamics Resolved in Space and Time in the Isopropanol Molecule
Autor: Siqi Li, Ludvig Kjellsson, A. Clark, Leszek J. Frasinski, Morgane Vacher, Agostino Marinelli, Alberto Lutman, Richard J. Squibb, Douglas Garratt, Sebastian Jarosch, Raimund Feifel, Michael J. Bearpark, Esben Witting Larsen, James P. Cryan, Ryan Coffee, J. P. Marangos, Oliver Alexander, Michael A. Robb, M. Ruberti, Marcus Agåker, Kiyoshi Ueda, Taran Driver, John D. Bozek, Christopher Arrell, Alvaro Sanchez-Gonzalez, Christoph Bostedt, T. J. Maxwell, Yoshiaki Kumagai, Vitali Zhaunerchyk, Timur Osipov, A. Tan, Philip H. Bucksbaum, D. J. Walke, B. D. Cooper, Andre Al Haddad, Thomas J. A. Wolf, Paloma Matia-Hernando, Jan-Erik Rubensson, Christian Brahms, Darien Wood, T. Barillot, Přemysl Kolorenč, Nora Berrah, Allan S. Johnson, Peter Walter, Conny Såthe, Vitali Averbukh, Gilles Doumy, John W. G. Tisch
Publikováno v: Physical Review X, Vol 11, Iss 3, p 031048 (2021)
Physical Review X
Physical Review X, American Physical Society, 2021, 11 (3), ⟨10.1103/PhysRevX.11.031048⟩
The possibility of suddenly ionized molecules undergoing extremely fast electron hole (or hole) dynamics prior to significant structural change was first recognized more than 20 years ago and termed charge migration. The accurate probing of ultrafast
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32158b644a28472af38c930feb5361ff
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-455870
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10
Tracking localised exciton formation in organic semiconductor material
Autor: Xijia Zheng, John W. G. Tisch, Marios Maimaris, D. Walke, Pabitra Shakya Tuladhar, Andrei Gorodetsky, Artem A. Bakulin, Allan J. Pettipher, Helder Crespo
Publikováno v: Physical Chemistry of Semiconductor Materials and Interfaces IX.
Here, using single-material OPV device and laser system with sub-10fs time resolution, we track in time the formation of localised excitonic states. For this we employ a combination of pump-probe (PP) spectroscopy, sensitive to concentration of excit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed197b1b720c59e48ad84d93073338ad
https://doi.org/10.1117/12.2568527
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