{"id":21372,"date":"2011-10-07T00:26:20","date_gmt":"2011-10-06T21:26:20","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=21372"},"modified":"2011-11-19T02:14:12","modified_gmt":"2011-11-18T23:14:12","slug":"teadlased-muutsid-uksiku-footoni-suurust-ja-varvi","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=21372","title":{"rendered":"Teadlased muutsid \u00fcksiku footoni suurust ja v\u00e4rvi"},"content":{"rendered":"<p><strong>CNST ja ITL teadlaster\u00fchm muutis samaaegselt \u00fcksiku footoni v\u00e4rvi ja suurust.<\/strong><\/p>\n<p>Teadusajakirjas <em>Physical Review Letters<\/em> ilmunud teadusartikkel esindab olulist sammu tuleviku kaugside vahendite arengus, kus privaatsuse tagavad kvantf\u00fc\u00fcsika seadused, kirjutab <a href=\"http:\/\/www.physorg.com\/news\/2011-10-photon.html\">Physorg.com<\/a>.<\/p>\n<div id=\"attachment_21373\" style=\"width: 536px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/10\/25-researchersc.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-21373\" class=\"size-full wp-image-21373    \" title=\"25-researchersc\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/10\/25-researchersc.jpg\" alt=\"\" width=\"526\" height=\"174\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/25-researchersc.jpg 1304w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/25-researchersc-300x99.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/25-researchersc-1024x338.jpg 1024w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/25-researchersc-250x82.jpg 250w\" sizes=\"auto, (max-width: 526px) 100vw, 526px\" \/><\/a><p id=\"caption-attachment-21373\" class=\"wp-caption-text\">Kvantt\u00e4pp-\u00fcksikfootonallikast (Quantum Dot Single Photon Source ehk QD SPS) saadud footoni v\u00e4rvt ja suurust muudetakse t\u00e4nu tugevale pulseerivale laserile mittelineaarses kristallis.<\/p><\/div>\n<p>Teadlased eraldasid spetsiaalselt valmistatud optilisest kiust sensori abil telekommunikatsiooni lainepikkusel oleva \u00fcksiku footoni\u00a0kvantt\u00e4pist &#8211; aatomi pooljuhist analoogist, mis pandi \u00fcksikuid footoneid kiirgama.\u00a0Seej\u00e4rel kombineeriti iga footon mittelineaarses optilises kristallis, mis v\u00f5imaldab kahel valguskiirel erinevalt reageerida, palju tugevama pulseeriva laserkiirega.<\/p>\n<p>P\u00e4rast kristalli ergastamist nihkus footoni lainepikkus ehk v\u00e4rv pea 600 nanomeetri v\u00f5rra, mis on rohkem kui terve n\u00e4htava valguse lainepikkuste vahemik.<\/p>\n<p>Et teadlased kasutasid pulseerivat laserit, siis j\u00e4\u00e4dvustus selle hetkeline kuju v\u00e4rvimuutuse protsessi jooksul footonisse.<\/p>\n<p>Teadlased v\u00f5iksid erinevates \u00fcksikute footonite kindlat lainepikkust ja kuju n\u00f5udvates kvantehnoloogiates seda l\u00e4henemist \u00e4ra kasutada, et siduda varem omavahel kombineerimatud s\u00fcsteemid suureskaalalistes kvant-infot\u00f6\u00f6tlus rakendustes.<\/p>\n<p><a href=\"http:\/\/www.physorg.com\/news\/2011-10-photon.html\">Allikas<\/a><\/p>\n<p>Teadusartikkel: &#8220;<a href=\"http:\/\/prl.aps.org\/abstract\/PRL\/v107\/i8\/e083602\">Simultaneous wavelength translation and amplitude modulation of single photons from a quantum dot<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CNST ja ITL teadlaster\u00fchm muutis samaaegselt \u00fcksiku footoni v\u00e4rvi ja suurust. Teadusajakirjas Physical Review Letters ilmunud teadusartikkel esindab olulist sammu tuleviku kaugside vahendite arengus, kus privaatsuse tagavad kvantf\u00fc\u00fcsika seadused, kirjutab Physorg.com. Teadlased eraldasid spetsiaalselt valmistatud optilisest kiust sensori abil telekommunikatsiooni lainepikkusel oleva \u00fcksiku footoni\u00a0kvantt\u00e4pist &#8211; aatomi pooljuhist analoogist, mis pandi \u00fcksikuid footoneid kiirgama.\u00a0Seej\u00e4rel kombineeriti iga [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":21373,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[31,16],"tags":[133],"class_list":{"0":"post-21372","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-rakenduslik-teadus","8":"category-teadusuudis","9":"tag-saagu-valgus","10":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/21372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21372"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/21372\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/21373"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}