Broad range electric field enhancement of a plasmonic nanosphere heterodimer

Debu, Desalegn T.; Yan, Qiangu; Darweesh, Ahmad A.; Benamara, Mourad; Salamo, Gregory J.

doi:10.1364/ome.396449

Cited by 19 publications

(7 citation statements)

References 49 publications

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“…It is possible to observe that at 633 nm the signal intensity is much stronger compared to the other wavelengths, a very good indication that for the case of a dimer, the hot spot is only active at one of the considered excitation frequencies. Of course, with more excitation lines available it would be possible to achieve a spectral distribution of enhanced intensities more precisely, such distribution so far has only been reported through simulations and very few experimental attempts [ 28 , 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

Raman Enhancement of Nanoparticle Dimers Self-Assembled Using DNA Origami Nanotriangles

et al. 2021

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Surface-enhanced Raman scattering is a powerful approach to detect molecules at very low concentrations, even up to the single-molecule level. One important aspect of the materials used in such a technique is how much the signal is intensified, quantified by the enhancement factor (EF). Herein we obtained the EFs for gold nanoparticle dimers of 60 and 80 nm diameter, respectively, self-assembled using DNA origami nanotriangles. Cy5 and TAMRA were used as surface-enhanced Raman scattering (SERS) probes, which enable the observation of individual nanoparticles and dimers. EF distributions are determined at four distinct wavelengths based on the measurements of around 1000 individual dimer structures. The obtained results show that the EFs for the dimeric assemblies follow a log-normal distribution and are in the range of 106 at 633 nm and that the contribution of the molecular resonance effect to the EF is around 2, also showing that the plasmonic resonance is the main source of the observed signal. To support our studies, FDTD simulations of the nanoparticle’s electromagnetic field enhancement has been carried out, as well as calculations of the resonance Raman spectra of the dyes using DFT. We observe a very close agreement between the experimental EF distribution and the simulated values.

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Section: Resultsmentioning

confidence: 99%

Raman Enhancement of Nanoparticle Dimers Self-Assembled Using DNA Origami Nanotriangles

et al. 2021

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“…As the AgNP composition increased, the super-radiant mode of the heterogeneous cluster was blueshifted by plasmon hybridization. [38,39]…”

Section: Tuning the Resonant Wavelength Using Heterogeneous Structuresmentioning

confidence: 99%

Nanofountain Pen for Writing Hybrid Plasmonic Architectures

Kim,

Lee

et al. 2023

Small Structures

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Self‐assembled colloidal nanostructures enable various interesting fabrication alternatives to current top‐down lithographic approaches for supporting localized surface plasmon resonance (LSPR). Recently, there have been numerous efforts to manipulate the LSPR in structural or compositional engineering using clustered nanoparticles (NPs). However, creating heterogeneous colloidal clusters comprising two or more types of NPs requires a complicated chemical synthesis of the linker molecules on the NP surfaces. Moreover, the traditional assembly methods pose several challenges to 3D manufacturing. Herein, a fountain pen‐inspired open‐microfluidic approach demonstrating an exquisite balance between evaporation and capillary action is reported. This approach enables the direct writing of binary NP clusters. Microcapillaries are designed to precisely control the evaporation and capillary action of the binary NP suspension ink at the tip. This approach effectively guides the growth of NP clusters along the out‐of‐plane direction to fabricate a freeform microarchitecture. The growth characteristics are theoretically explained using a simplified balancing model. In addition, the optical properties can be tuned precisely using multicolloidal NP mixing. A Janus pillar comprising plasmonic NPs and biomolecules is showcased as a microactuator operating under chemical stimuli. It is expected that the proposed method paves the way for manufacturing numerous interesting structures in nanophotonics.

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“…They reported that, in the case of the Ag─Au heterodimer, the electric field increases significantly in the visible range with wavelengths longer than 550 nm. [ 45 ] Similar to these examples, the amplification of radiation pressure via an SP can be utilized effectively in driving piezoelectric energy harvesting devices that use sunlight.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of Energy Harvesting Device Using Light Pressure Through Plasmon Coupling at the Interface Between Grained Ag Layer and Au Nanoparticles

Jang,

Lee,

Ryu

et al. 2023

Advanced Optical Materials

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Electricity generation using the piezoelectric effect is an important energy harvesting method. In this study, a solar radiation pressure‐driven crater‐shaped light pressure electric generator (LPEG) device with a Pb(Zr0.52, Ti0.48)O3 (PZT) piezoelectric layer and grained Ag layer is fabricated on GaAs(100) wafer. The electrical output of the device is improved by adsorbing Au nanoparticles (AuNPs) on the Ag layer with the surface of closely connected Ag nanoparticles (AgNPs). By controlling the size and concentration of the AuNPs, a maximum power density of 867.5 µW cm−2 is obtained under a solar simulator (AM 1.5G), which represents a 151.7% improvement over the case without AuNP adsorption. The results of Raman spectra, finite‐difference time‐domain (FDTD) simulations, and COMSOL Multiphysics demonstrate that the newly formed hotspots between AgNPs─AuNPs and AuNPs─AuNPs enhance the electric field of the incident light significantly and extend the region where the electric field is maximally amplified to 600–800 nm, resulting in increased solar radiation pressure on the PZT piezoelectric layer.

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Broad range electric field enhancement of a plasmonic nanosphere heterodimer

Cited by 19 publications

References 49 publications

Raman Enhancement of Nanoparticle Dimers Self-Assembled Using DNA Origami Nanotriangles

Raman Enhancement of Nanoparticle Dimers Self-Assembled Using DNA Origami Nanotriangles

Nanofountain Pen for Writing Hybrid Plasmonic Architectures

Efficiency Improvement of Energy Harvesting Device Using Light Pressure Through Plasmon Coupling at the Interface Between Grained Ag Layer and Au Nanoparticles

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