{"id":6823,"date":"2025-11-06T05:51:00","date_gmt":"2025-11-06T04:51:00","guid":{"rendered":"https:\/\/viva.racunalniske-novice.com\/kvantni-preboj-v-optiki\/"},"modified":"2025-11-06T05:51:00","modified_gmt":"2025-11-06T04:51:00","slug":"kvantni-preboj-v-optiki","status":"publish","type":"post","link":"https:\/\/viva.racunalniske-novice.com\/fr\/percee-quantique-en-optique\/","title":{"rendered":"Perc\u00e9e quantique en optique"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Des scientifiques ont r\u00e9alis\u00e9 une avanc\u00e9e majeure en optique. Gr\u00e2ce \u00e0 l&#039;utilisation de mat\u00e9riaux quantiques, ils ont confirm\u00e9 exp\u00e9rimentalement pour la premi\u00e8re fois la g\u00e9n\u00e9ration d&#039;harmoniques d&#039;ordre \u00e9lev\u00e9 (HHG) dans la gamme des t\u00e9rahertz (THz), y compris aux fr\u00e9quences paires. Ceci \u00e9tait auparavant impossible en raison de la sym\u00e9trie de la plupart des mat\u00e9riaux.<br><br>La g\u00e9n\u00e9ration d&#039;harmoniques d&#039;ordre \u00e9lev\u00e9 (HHG) permet la conversion de la lumi\u00e8re vers des fr\u00e9quences plus \u00e9lev\u00e9es, ouvrant ainsi l&#039;acc\u00e8s \u00e0 des parties du spectre \u00e9lectromagn\u00e9tique autrement inaccessibles. Le graph\u00e8ne est depuis longtemps un candidat prometteur, mais en raison de sa sym\u00e9trie parfaite, il ne produit que des harmoniques impaires.<br><br>Dans cette \u00e9tude, publi\u00e9e dans Light: Science &amp; Applications, une \u00e9quipe dirig\u00e9e par la professeure Miriam Serena Vitiello a utilis\u00e9 des isolants topologiques (IT), des mat\u00e9riaux conducteurs d&#039;\u00e9lectricit\u00e9 en surface et isolants en leur c\u0153ur. Ces mat\u00e9riaux poss\u00e8dent des propri\u00e9t\u00e9s quantiques uniques dues \u00e0 un fort couplage spin-orbite et \u00e0 la sym\u00e9trie d&#039;inversion temporelle.<br><br>Les chercheurs ont utilis\u00e9 des nanostructures \u00e0 r\u00e9sonateur \u00e0 anneau fendu (SRR) qu&#039;ils ont combin\u00e9es avec de fines couches de Bi\u2082Se\u2083 et des h\u00e9t\u00e9rostructures (In\u2093Bi\u2081\u208b\u2093)\u2082Se\u2083. \u00c0 l&#039;aide d&#039;un laser \u00e0 cascade quantique THz de 2,5 W, ils ont obtenu une amplification de la lumi\u00e8re et observ\u00e9 la g\u00e9n\u00e9ration d&#039;harmoniques d&#039;ordre \u00e9lev\u00e9 (HHG) \u00e0 6,4 THz (nombre pair) et 9,7 THz (nombre impair).<br><br>Ces r\u00e9sultats confirment les pr\u00e9dictions th\u00e9oriques et permettent le d\u00e9veloppement de sources lumineuses THz compactes, de capteurs et de composants opto\u00e9lectroniques ultrarapides. Ces progr\u00e8s d\u00e9montrent le formidable potentiel des mat\u00e9riaux quantiques pour les technologies futures, notamment les communications, l&#039;imagerie m\u00e9dicale et, bien s\u00fbr, l&#039;informatique quantique.<\/p>","protected":false},"excerpt":{"rendered":"<p>Znanstveniki so dosegli pomemben preboj v optiki. Z uporabo kvantnih materialov so namre\u010d prvi\u010d eksperimentalno potrdili visoko-redno generacijo harmonikov (HHG) v teraher\u010dnem (THz) obmo\u010dju, vklju\u010dno s parnimi frekvencami. To je bilo doslej nemogo\u010de zaradi simetrije ve\u010dine materialov. HHG omogo\u010da pretvorbo svetlobe v vi\u0161je frekvence, kar odpira dostop do sicer nedosegljivih delov elektromagnetnega spektra. Grafen je [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[16],"tags":[350],"class_list":["post-6823","post","type-post","status-publish","format-standard","hentry","category-oprema","tag-custom-racunalniki"],"acf":{"subtitle":"Z uporabo topolo\u0161kih izolatorjev in kvantnih nanostruktur so znanstveniki prvi\u010d eksperimentalno potrdili visoko-redno generacijo harmonikov v THz obmo\u010dju. Odkritje odpira pot novim tehnologijam v komunikaciji, medicini in kvantnem ra\u010dunalni\u0161tvu.","heading":"","summary":"Z uporabo topolo\u0161kih izolatorjev in kvantnih nanostruktur so znanstveniki prvi\u010d eksperimentalno potrdili visoko-redno generacijo harmonikov v THz obmo\u010dju. Odkritje odpira pot novim tehnologijam v komunikaciji, medicini in kvantnem ra\u010dunalni\u0161tvu.","thumbnail_small":"https:\/\/racunalniske-novice.com\/wp-content\/uploads\/2025\/11\/laser-11646_1280-560x315.jpg","thumbnail_large":"https:\/\/racunalniske-novice.com\/wp-content\/uploads\/2025\/11\/laser-11646_1280-1024x788.jpg","thumbnail_caption":"","gallery":"","video_gallery":null,"author":"","links":[{"title":"Light: Science &amp; Applications","url":""}],"sources":null,"skip_language":[]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kvantni preboj v optiki - Ra\u010dunalni\u0161ke novice<\/title>\n<meta name=\"description\" content=\"Z uporabo topolo\u0161kih izolatorjev in kvantnih nanostruktur so znanstveniki prvi\u010d eksperimentalno potrdili visoko-redno generacijo harmonikov v THz obmo\u010dju. 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