Spatiotemporal coupling of attosecond pulses
(2019) In Proceedings of the National Academy of Sciences of the United States of America 116(11). p.4779-4787- Abstract
The shortest light pulses produced to date are of the order of a few tens of attoseconds, with central frequencies in the extreme UV range and bandwidths exceeding tens of electronvolts. They are often produced as a train of pulses separated by half the driving laser period, leading in the frequency domain to a spectrum of high, odd-order harmonics. As light pulses become shorter and more spectrally wide, the widely used approximation consisting of writing the optical waveform as a product of temporal and spatial amplitudes does not apply anymore. Here, we investigate the interplay of temporal and spatial properties of attosecond pulses. We show that the divergence and focus position of the generated harmonics often strongly depend on... (More)
The shortest light pulses produced to date are of the order of a few tens of attoseconds, with central frequencies in the extreme UV range and bandwidths exceeding tens of electronvolts. They are often produced as a train of pulses separated by half the driving laser period, leading in the frequency domain to a spectrum of high, odd-order harmonics. As light pulses become shorter and more spectrally wide, the widely used approximation consisting of writing the optical waveform as a product of temporal and spatial amplitudes does not apply anymore. Here, we investigate the interplay of temporal and spatial properties of attosecond pulses. We show that the divergence and focus position of the generated harmonics often strongly depend on their frequency, leading to strong chromatic aberrations of the broadband attosecond pulses. Our argument uses a simple analytical model based on Gaussian optics, numerical propagation calculations, and experimental harmonic divergence measurements. This effect needs to be considered for future applications requiring highquality focusing while retaining the broadband/ultrashort characteristics of the radiation.
(Less)
- author
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Attosecond pulse, Focusing of XUV radiation, Gaussian optics, High-order harmonic generation, Spatiotemporal coupling
- in
- Proceedings of the National Academy of Sciences of the United States of America
- volume
- 116
- issue
- 11
- pages
- 9 pages
- publisher
- National Academy of Sciences
- external identifiers
-
- pmid:30824594
- scopus:85062886029
- ISSN
- 0027-8424
- DOI
- 10.1073/pnas.1817626116
- language
- English
- LU publication?
- yes
- id
- eb09fae9-05aa-43a3-a0ec-2e33b20e7ecd
- date added to LUP
- 2019-03-21 14:50:34
- date last changed
- 2024-09-18 15:32:17
@article{eb09fae9-05aa-43a3-a0ec-2e33b20e7ecd, abstract = {{<p>The shortest light pulses produced to date are of the order of a few tens of attoseconds, with central frequencies in the extreme UV range and bandwidths exceeding tens of electronvolts. They are often produced as a train of pulses separated by half the driving laser period, leading in the frequency domain to a spectrum of high, odd-order harmonics. As light pulses become shorter and more spectrally wide, the widely used approximation consisting of writing the optical waveform as a product of temporal and spatial amplitudes does not apply anymore. Here, we investigate the interplay of temporal and spatial properties of attosecond pulses. We show that the divergence and focus position of the generated harmonics often strongly depend on their frequency, leading to strong chromatic aberrations of the broadband attosecond pulses. Our argument uses a simple analytical model based on Gaussian optics, numerical propagation calculations, and experimental harmonic divergence measurements. This effect needs to be considered for future applications requiring highquality focusing while retaining the broadband/ultrashort characteristics of the radiation.</p>}}, author = {{Wikmark, Hampus and Guo, Chen and Vogelsang, Jan and Smorenburg, Peter W. and Coudert-Alteirac, Hélène and Lahl, Jan and Peschel, Jasper and Rudawski, Piotr and Dacasa, Hugo and Carlström, Stefanos and MacLot, Sylvain and Gaarde, Mette B. and Johnsson, Per and Arnold, Cord L. and L'Huillier, Anne}}, issn = {{0027-8424}}, keywords = {{Attosecond pulse; Focusing of XUV radiation; Gaussian optics; High-order harmonic generation; Spatiotemporal coupling}}, language = {{eng}}, number = {{11}}, pages = {{4779--4787}}, publisher = {{National Academy of Sciences}}, series = {{Proceedings of the National Academy of Sciences of the United States of America}}, title = {{Spatiotemporal coupling of attosecond pulses}}, url = {{http://dx.doi.org/10.1073/pnas.1817626116}}, doi = {{10.1073/pnas.1817626116}}, volume = {{116}}, year = {{2019}}, }