Polarization-controlled anisotropy in hybrid plasmonic nanoparticles

Abstract: 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.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Polarization-controlled anisotropy in hybrid plasmonic nanoparticles ; volume:11 ; number:5 ; year:2022 ; pages:1003-1009 ; extent:07 ; Nanophotonics ; 11, Heft 5 (2022), 1003-1009 (gesamt 07)

Contributors, Places and Time

• Creator: Wang, Xujie ; Dou, Zhenlong ; Zhang, Chi ; Deng, FangFang ; Lu, XiaoLin ; Wang, ShuangShuang ; Zhou, Li ; Ding, Tao

Further information

• DOI: 10.1515/nanoph-2021-0691
• URN: urn:nbn:de:101:1-2022120813225104677873
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:34 AM CEST