Polarization-controlled anisotropy in hybrid plasmonic nanoparticles
In: Nanophotonics, Jg. 11 (2022), Heft 5, S. 1003-1009
Online
academicJournal
Zugriff:
Anisotropy has played a critical role in many material systems, but its controllable creation and modulation have been a long-lasting challenge for the scientific communities. Polarization-addressed anisotropy appears more attractive among all approaches due to its excellent controllability, simplicity, and accuracy, but only a limited number of material systems are applicable for such a concept, which are largely focused on oriented growth. Here, we establish a polarization-dependent anisotropic etching system made of Au@oligomer core–shell nanoparticles (NPs). As the oligomer coatings can be photochemically degraded via two-photon photolithography, the plasmonic near-field enhancement supported by the Au NP cores renders much faster degradation of the oligomer shells along the polarization, resulting in anisotropic Au@oligomer hybrid NPs. Such shape anisotropy leads to polarization-dependent photoluminescence with embedded dyes of methylene blue, which can be used as single-particle-based polarization detector. The oligomer lobes capped at the sides of the Au NP can also function as a protection agent for anisotropic photochemical growth of Au NPs, which evolve into Au nanorods and mushrooms with controlled irradiation time. Such polarization-directed etching of oligomer shells has unique advantages of high local-selectivity, controllability, and versatility for on-chip nanofabrication, which opens many new opportunities for integrated nanophotonic devices.
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Polarization-controlled anisotropy in hybrid plasmonic nanoparticles
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Autor/in / Beteiligte Person: | Xujie, Wang ; Zhenlong, Dou ; Chi, Zhang ; FangFang, Deng ; XiaoLin, Lu ; ShuangShuang, Wang ; Li, Zhou ; Tao, Ding |
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Zeitschrift: | Nanophotonics, Jg. 11 (2022), Heft 5, S. 1003-1009 |
Veröffentlichung: | De Gruyter, 2022 |
Medientyp: | academicJournal |
ISSN: | 2192-8614 (print) |
DOI: | 10.1515/nanoph-2021-0691 |
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