A Dual-Colour Architecture for Pump-Probe Spectroscopy of Ultrafast Magnetization Dynamics in the Sub-10-femtosecond Range
(2016) In Scientific Reports 6.- Abstract
Current time-resolution-limited dynamic measurements clearly show the need for improved techniques to access processes on the sub-10-femtosecond timescale. To access this regime, we have designed and constructed a state-of-the-art time-resolved magneto-optic Kerr effect apparatus, based on a new dual-color scheme, for the measurement of ultrafast demagnetization and precessional dynamics in magnetic materials. This system can operate well below the current temporal ranges reported in the literature, which typically lie in the region of around 50 fs and above. We have used a dual-colour scheme, based on ultra broadband hollow-core fibre and chirped mirror pulse compression techniques, to obtain unprecedented sub-8-fs pump and probe pulse... (More)
Current time-resolution-limited dynamic measurements clearly show the need for improved techniques to access processes on the sub-10-femtosecond timescale. To access this regime, we have designed and constructed a state-of-the-art time-resolved magneto-optic Kerr effect apparatus, based on a new dual-color scheme, for the measurement of ultrafast demagnetization and precessional dynamics in magnetic materials. This system can operate well below the current temporal ranges reported in the literature, which typically lie in the region of around 50 fs and above. We have used a dual-colour scheme, based on ultra broadband hollow-core fibre and chirped mirror pulse compression techniques, to obtain unprecedented sub-8-fs pump and probe pulse durations at the sample plane. To demonstrate the capabilities of this system for ultrafast demagnetization and precessional dynamics studies, we have performed measurements in a ferrimagnetic GdFeCo thin film. Our study has shown that the magnetization shows a sudden drop within the first picosecond after the pump pulse, a fast recovery (remagnetization) within a few picoseconds, followed by a clear oscillation or precession during a slower magnetization recovery. Moreover, we have experimentally confirmed for the first time that a sub-10-fs pulse is able to efficiently excite a magnetic system such as GdFeCo.
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- author
- Goncąlves, C. S. ; Silva, A. S. ; Navas, D. ; Miranda, M. LU ; Silva, F. ; Crespo, H. and Schmool, D. S.
- organization
- publishing date
- 2016-03-15
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 6
- article number
- 22872
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:84962614872
- pmid:26976721
- wos:000372033500001
- ISSN
- 2045-2322
- DOI
- 10.1038/srep22872
- language
- English
- LU publication?
- yes
- id
- 4673dcec-e20a-404b-aeed-e26a82834ba4
- date added to LUP
- 2016-07-11 12:45:52
- date last changed
- 2024-05-03 07:06:37
@article{4673dcec-e20a-404b-aeed-e26a82834ba4,
abstract = {{<p>Current time-resolution-limited dynamic measurements clearly show the need for improved techniques to access processes on the sub-10-femtosecond timescale. To access this regime, we have designed and constructed a state-of-the-art time-resolved magneto-optic Kerr effect apparatus, based on a new dual-color scheme, for the measurement of ultrafast demagnetization and precessional dynamics in magnetic materials. This system can operate well below the current temporal ranges reported in the literature, which typically lie in the region of around 50 fs and above. We have used a dual-colour scheme, based on ultra broadband hollow-core fibre and chirped mirror pulse compression techniques, to obtain unprecedented sub-8-fs pump and probe pulse durations at the sample plane. To demonstrate the capabilities of this system for ultrafast demagnetization and precessional dynamics studies, we have performed measurements in a ferrimagnetic GdFeCo thin film. Our study has shown that the magnetization shows a sudden drop within the first picosecond after the pump pulse, a fast recovery (remagnetization) within a few picoseconds, followed by a clear oscillation or precession during a slower magnetization recovery. Moreover, we have experimentally confirmed for the first time that a sub-10-fs pulse is able to efficiently excite a magnetic system such as GdFeCo.</p>}},
author = {{Goncąlves, C. S. and Silva, A. S. and Navas, D. and Miranda, M. and Silva, F. and Crespo, H. and Schmool, D. S.}},
issn = {{2045-2322}},
language = {{eng}},
month = {{03}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{A Dual-Colour Architecture for Pump-Probe Spectroscopy of Ultrafast Magnetization Dynamics in the Sub-10-femtosecond Range}},
url = {{http://dx.doi.org/10.1038/srep22872}},
doi = {{10.1038/srep22872}},
volume = {{6}},
year = {{2016}},
}