{"id":6299,"date":"2022-01-17T10:27:10","date_gmt":"2022-01-17T09:27:10","guid":{"rendered":"https:\/\/laser.usal.es\/alf\/?p=6299"},"modified":"2022-01-17T10:28:36","modified_gmt":"2022-01-17T09:28:36","slug":"tailoring-complex-structures-in-high-frequency-light","status":"publish","type":"post","link":"https:\/\/laser.usal.es\/alf\/en\/2022\/01\/17\/tailoring-complex-structures-in-high-frequency-light\/","title":{"rendered":"Tailoring complex structures in high-frequency light"},"content":{"rendered":"\t\t
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The prestigious journal Optica<\/em> has just published a new article demonstrating the generation of high-frequency light with multiple vibration directions and a spiral phase structure. The research is the result of an international theoretical-experimental collaboration between the Laser and Photonics Applications Group of the University of Salamanca, the University of Paris-Saclay<\/em> and the Colorado School of Mines<\/em>. This work was developed within the European project ERC ATTOSTRUCTURA.<\/a><\/strong><\/span><\/p>

One of the great advantages of laser light is that we can shape its spatial properties, with the aim of exploring new scenarios in light-matter interaction and optimizing some applications such as imaging techniques or optical communications.<\/span><\/p>

In this work we organize the distribution of the phase (the instantaneous oscillation position) in the form of a helix, which is the characteristic of optical vortices or \u201ctornadoes of light\u201d. In addition, we configure different polarizations (oscillation directions) in a single laser beam. Forms of light that combine both properties are called vector-vortex beams.<\/span><\/p>

In the high-frequency regime, it is more challenging to structure laser light, since most conventional devices are not efficient for ultraviolet radiation, X-rays or gamma rays. However, we can circumvent this problem thanks to the generation of high-order harmonics. This nonlinear optics process, in which a high-intensity visible or infrared laser interacts with the atoms of a gas, allows us to up-convert the properties into the extreme ultraviolet or X-rays.<\/span><\/p>

Our work demonstrates that we can generate vector-vortex beams in the extreme ultraviolet thanks to the physical conservation laws in high-order harmonic generation. Our theoretical proposal of a new conserved quantity, the Pancharatnam topological charge, in high harmonic generation has been confirmed experimentally in the laboratory of Paris-Saclay.<\/span><\/p><\/div>

More information at:<\/span><\/em><\/p>

Heras, A. de las, Pandey, A. K., Rom\u00e1n, J. S., Serrano, J., Baynard, E., Dovillaire, G., Pittman, M., Durfee, C. G., Plaja, L., Kazamias, S., Guilbaud, O., & Hern\u00e1ndez-Garc\u00eda, C. (2022). Extreme-ultraviolet vector-vortex beams from high harmonic generation. Optica<\/i>, 9<\/i>(1), 71-79. https:\/\/doi.org\/10.1364\/OPTICA.442304<\/a><\/div>
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Download the full paper at Gredos @Universidad de Salamanca: http:\/\/hdl.handle.net\/10366\/146004<\/a><\/p><\/div><\/div>

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Twittear<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"

The prestigious journal Optica has just published a new article demonstrating the generation of high-frequency light with multiple vibration directions and a spiral phase structure. The research is the result of an international theoretical-experimental collaboration between the Laser and Photonics Applications Group of the University of Salamanca, the University of Paris-Saclay and the Colorado School<\/p>\n","protected":false},"author":1,"featured_media":6279,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[428,386],"tags":[],"class_list":["post-6299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-attostructura-en","category-review"],"_links":{"self":[{"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/posts\/6299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/comments?post=6299"}],"version-history":[{"count":3,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/posts\/6299\/revisions"}],"predecessor-version":[{"id":6302,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/posts\/6299\/revisions\/6302"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/media\/6279"}],"wp:attachment":[{"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/media?parent=6299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/categories?post=6299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/laser.usal.es\/alf\/wp-json\/wp\/v2\/tags?post=6299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}