Plasmonic Horizon in Gold Nanosponges.
Nano Lett
; 18(2): 1269-1273, 2018 02 14.
Article
em En
| MEDLINE
| ID: mdl-29337572
ABSTRACT
An electromagnetic wave impinging on a gold nanosponge coherently excites many electromagnetic hot-spots inside the nanosponge, yielding a polarization-dependent scattering spectrum. In contrast, a hole, recombining with an electron, can locally excite plasmonic hot-spots only within a horizon given by the lifetime of localized plasmons and the speed carrying the information that a plasmon has been created. This horizon is about 57 nm, decreasing with increasing size of the nanosponge. Consequently, photoluminescence from large gold nanosponges appears unpolarized.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2018
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Article