{"id":884,"date":"2018-06-19T18:51:04","date_gmt":"2018-06-19T20:51:04","guid":{"rendered":"https:\/\/sites.ifi.unicamp.br\/odilon\/?p=884"},"modified":"2019-05-19T20:54:34","modified_gmt":"2019-05-19T22:54:34","slug":"revealing-the-optical-properties-of-two-dimensional-materials","status":"publish","type":"post","link":"https:\/\/sites.ifi.unicamp.br\/odilon\/2018\/06\/19\/revealing-the-optical-properties-of-two-dimensional-materials\/","title":{"rendered":"Revealing the optical properties of two-dimensional materials"},"content":{"rendered":"<p style=\"text-align: justify\">In collaboration with the Federal University of S\u00e3o Carlos, the University of Bras\u00edlia, the University of Southampton, and the University of Nottingham, we investigated the properties of charged excitons in large-area WS<sub>2<\/sub>, a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Transition_metal_dichalcogenide_monolayers\">transition metal dichalcogenide<\/a>. We investigate in details the recombination dynamics of the different excitonic complexes of the system. We show that, in particular, the neutral and singly-charged (trion) exciton dynamics are influenced by charge injection from SiO<sub>2<\/sub> substrates, which contribute to a redistribution of the exciton complexes along time. The Figure below shows the time evolution of the neutral (X), trions (T<sub>1<\/sub> and T<sub>2<\/sub>), bound (X<sub>B<\/sub>), and localized ecitons (LS) as the pumping (laser) power conditions are modified, demonstrating irreversible processes in the exciton emission after long exposure times and pumping power. This work contributes to the understanding of the excitonic dynamics in this new class of materials, which may be important for future optoelectronic devices in graphene-like materials.<\/p>\n<p>To access to the full text, click <a href=\"https:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2018\/nr\/c8nr00719e#!divAbstract\">HERE<\/a>.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-892 aligncenter\" src=\"https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/WS2.jpg\" alt=\"\" width=\"450\" height=\"600\" srcset=\"https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/WS2.jpg 720w, https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/WS2-225x300.jpg 225w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p>\n<p><a href=\"https:\/\/portal.ifi.unicamp.br\/a-instituicao\/noticias\/12-ifgw-em-destaque\/1018-artigo-de-colaboracao-do-ifgw-revela-detalhes-sobre-as-propriedades-opticas-de-novos-semicondutores-lamelares\">You can also see the web release of this work in our institute webpage.<\/a><a href=\"https:\/\/portal.ifi.unicamp.br\/a-instituicao\/noticias\/12-ifgw-em-destaque\/1018-artigo-de-colaboracao-do-ifgw-revela-detalhes-sobre-as-propriedades-opticas-de-novos-semicondutores-lamelares\"><img decoding=\"async\" class=\"wp-image-894 aligncenter\" src=\"https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/Foto-WS2-ifgw.jpg\" alt=\"\" width=\"286\" height=\"215\" srcset=\"https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/Foto-WS2-ifgw.jpg 600w, https:\/\/sites.ifi.unicamp.br\/odilon\/files\/2019\/05\/Foto-WS2-ifgw-300x225.jpg 300w\" sizes=\"(max-width: 286px) 100vw, 286px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In collaboration with the Federal University of S\u00e3o Carlos, the University of Bras\u00edlia, the University of Southampton, and the University of Nottingham, we investigated the properties of charged excitons in large-area WS2, a transition metal dichalcogenide. We investigate in details the recombination dynamics of the different excitonic complexes of the system. We show that, in &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/sites.ifi.unicamp.br\/odilon\/2018\/06\/19\/revealing-the-optical-properties-of-two-dimensional-materials\/\">Continue lendo<\/a><\/p>\n","protected":false},"author":48,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-884","post","type-post","status-publish","format-standard","hentry","category-research","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/posts\/884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/users\/48"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/comments?post=884"}],"version-history":[{"count":12,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/posts\/884\/revisions"}],"predecessor-version":[{"id":901,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/posts\/884\/revisions\/901"}],"wp:attachment":[{"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/media?parent=884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/categories?post=884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/odilon\/wp-json\/wp\/v2\/tags?post=884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}