Resonant Self-Diffraction of Femtosecond Extreme Ultraviolet Pulses in Cobalt
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915283174686720 |
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| author | Maznev, Alexei A. Lee, Wonseok Cushing, Scott K. De Angelis, Dario Fainozzi, Danny Foglia, Laura Gutt, Christian Jaouen, Nicolas Kammerbauer, Fabian Masciovecchio, Claudio Mincigrucci, Riccardo Nelson, Keith A. Paltanin, Ettore Pelli-Cresi, Jacopo Stefano Polewczyk, Vincent Ksenzov, Dmitriy Bencivenga, Filippo |
| author_facet | Maznev, Alexei A. Lee, Wonseok Cushing, Scott K. De Angelis, Dario Fainozzi, Danny Foglia, Laura Gutt, Christian Jaouen, Nicolas Kammerbauer, Fabian Masciovecchio, Claudio Mincigrucci, Riccardo Nelson, Keith A. Paltanin, Ettore Pelli-Cresi, Jacopo Stefano Polewczyk, Vincent Ksenzov, Dmitriy Bencivenga, Filippo |
| contents | Self-diffraction is a non-collinear four-wave mixing technique well-known in optics. We explore self-diffraction in the extreme ultraviolet (EUV) range, taking advantage of intense femtosecond EUV pulses produced by a free electron laser. Two pulses are crossed in a thin cobalt film and their interference results in a spatially periodic electronic excitation. The diffraction of one of the same pulses by the associated refractive index modulation is measured as a function of the EUV wavelength. A sharp peak in the self-diffraction efficiency is observed at the M$_{2,3}$ absorption edge of cobalt at 59 eV and a fine structure is found above the edge. The results are compared with a theoretical model assuming that the excitation results in an increase of the electronic temperature. EUV self-diffraction offers a potentially useful spectroscopy tool and will be instrumental in studying coherent effects in the EUV range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_07168 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resonant Self-Diffraction of Femtosecond Extreme Ultraviolet Pulses in Cobalt Maznev, Alexei A. Lee, Wonseok Cushing, Scott K. De Angelis, Dario Fainozzi, Danny Foglia, Laura Gutt, Christian Jaouen, Nicolas Kammerbauer, Fabian Masciovecchio, Claudio Mincigrucci, Riccardo Nelson, Keith A. Paltanin, Ettore Pelli-Cresi, Jacopo Stefano Polewczyk, Vincent Ksenzov, Dmitriy Bencivenga, Filippo Optics Materials Science Self-diffraction is a non-collinear four-wave mixing technique well-known in optics. We explore self-diffraction in the extreme ultraviolet (EUV) range, taking advantage of intense femtosecond EUV pulses produced by a free electron laser. Two pulses are crossed in a thin cobalt film and their interference results in a spatially periodic electronic excitation. The diffraction of one of the same pulses by the associated refractive index modulation is measured as a function of the EUV wavelength. A sharp peak in the self-diffraction efficiency is observed at the M$_{2,3}$ absorption edge of cobalt at 59 eV and a fine structure is found above the edge. The results are compared with a theoretical model assuming that the excitation results in an increase of the electronic temperature. EUV self-diffraction offers a potentially useful spectroscopy tool and will be instrumental in studying coherent effects in the EUV range. |
| title | Resonant Self-Diffraction of Femtosecond Extreme Ultraviolet Pulses in Cobalt |
| topic | Optics Materials Science |
| url | https://arxiv.org/abs/2505.07168 |