Directed emission of CdSe nanoplatelets originating from strongly anisotropic 2D electronic structure
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Altres documents de l'autoria: Scott, Riccardo; Heckmann, Jan; Prudnikau, Anatol V.; Antanovich, Artsiom; Mikhailov, Aleksandr; Owschimikow, Nina; Artemyev, Mikhail V.; Climente, Juan I.; Woggon, Ulrike; Grosse, Nicolai B.; Achtstein, Alexander W.
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
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Directed emission of CdSe nanoplatelets originating from strongly anisotropic 2D electronic structureAutoria
Data de publicació
2017Editor
Nature Publishing GroupISSN
1748-3387; 1748-3395Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.nature.com/articles/nnano.2017.177#author-informationVersió
info:eu-repo/semantics/submittedVersionResum
ntrinsically directional light emitters are potentially important for applications in photonics including lasing and energy-efficient display technology. Here, we propose a new route to overcome intrinsic efficiency ... [+]
ntrinsically directional light emitters are potentially important for applications in photonics including lasing and energy-efficient display technology. Here, we propose a new route to overcome intrinsic efficiency limitations in light-emitting devices by studying a CdSe nanoplatelets monolayer that exhibits strongly anisotropic, directed photoluminescence. Analysis of the two-dimensional k-space distribution reveals the underlying internal transition dipole distribution. The observed directed emission is related to the anisotropy of the electronic Bloch states governing the exciton transition dipole moment and forming a bright plane. The strongly directed emission perpendicular to the platelet is further enhanced by the optical local density of states and local fields. In contrast to the emission directionality, the off-resonant absorption into the energetically higher 2D-continuum of states is isotropic. These contrasting optical properties make the oriented CdSe nanoplatelets, or superstructures of parallel-oriented platelets, an interesting and potentially useful class of semiconductor-based emitters. [-]
Publicat a
Nature Nanotechnology 12, (2017)Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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