Tunable Fano resonances in heterogenous Al–Ag nanorod dimers

Ci, Xueting; Wu, Botao; Song, Min; Liu, Y.; Chen, Gengxu; Wu, E; Zeng, Heping

doi:10.1007/s00339-014-8479-z

Cited by 21 publications

(5 citation statements)

References 36 publications

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“…Therefore, the gap in the dimer is as narrow as the molecular chain length. This further reduces the gap between two nanoparticles and causes a more remarkable hot spot effect [ 16 – 18 ].…”

Section: Introductionmentioning

confidence: 99%

Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer

et al. 2017

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Misaligned edge-to-edge dimers are the common products during the preparation of Ag nanoprism dimers using self-assembly method. However, in the self-assembly method, Ag nanoprisms are easily truncated because they are easy to oxidize in an acidic environment. In this work, modeling a truncated Ag nanoprism on a misaligned edge-to-edge dimer provides a better understanding of the effects of the truncation and misalignment on localized surface plasmon resonance (LSPR) of the dimer. The resonant wavelength and intensity of the dimer are flexibly modulated by changing the misalignment length of the dimer. As the misalignment length increases, a stronger peak at the shorter wavelength and a weaker one at the longer wavelength are observed. The resonant wavelengths and intensities of the two peaks are also flexibly tuned by adjusting the truncated length of the Ag nanoprism in the dimer. The results are numerically demonstrated based on the finite element method (FEM) and show promising potential for nanoswitch, multi-channel tunable biosensor and other nanodevice applications.

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Section: Introductionmentioning

confidence: 99%

Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer

et al. 2017

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“…When the center-to-center distance between neighboring silver nanorods is fixed at 50 nm a different radius of silver nanorod (r) in the stub can change the resonance condition of free space in the stub since the gap between adjacent silver nanorods is changed [48]. This can have a significant influence on the transmittance spectrum because the silver nanorod defects that are placed at the Bragg distance between the silver walls and silver nanorods can form a Fabry-Perot nanocavity and a coupled plasmonic system.…”

Section: Resultsmentioning

confidence: 99%

Mid-infrared sensing properties of a plasmonic metal–insulator–metal waveguide with a single stub including defects

Chau

2020

J. Phys. D: Appl. Phys.

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A highly sensitive surface plasmon polariton-based sensor with a simple structure comprising a metal–insulator–metal waveguide with a single stub including several silver nanorod defects is designed and numerically investigated, using the finite element method, for application in refractive index sensors and temperature sensors. The simulation results show that the existence of silver nanorod defects in the single stub has a large influence on the sensitivity performance, which provides an additional degree by which to manipulate the system response at the nanometer scale. The refractive index sensitivity can reach as high as 5140 nm RIU–1 (RIU, refractive index unit) and the temperature sensitivity is about 2.05 nm °C−1, which can be further improved by varying the length of stub, the radius of the defect rods and the number of defects in the stub. The sensing characteristics of the proposed simple structure could pave the way for highly integrated optical circuits for use in nanoscale refractive index sensors and temperature sensors with the single stub including the defects.

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“…Additionally, nanostructures can be formed from self-assembled nanoparticles linked through functionalization with molecules, where the molecule size determines the distance of the gap between the nanostructures. Therefore, different molecules will result in gap variations, resulting in enhanced hot spot effects [ 27 , 28 , 29 ]. Self-assembled nanoparticles can also form randomly misaligned structures, where edge-to-edge nanoparticles (i.e., gaps) induce a double resonance effect [ 30 ].…”

Section: Current Lspr Biosensors For the Detection Of Chemical And Biomoleculesmentioning

confidence: 99%

Biosensing Applications Using Nanostructure-Based Localized Surface Plasmon Resonance Sensors

Kim

Park

Jung

et al. 2021

Sensors

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Localized surface plasmon resonance (LSPR)-based biosensors have recently garnered increasing attention due to their potential to allow label-free, portable, low-cost, and real-time monitoring of diverse analytes. Recent developments in this technology have focused on biochemical markers in clinical and environmental settings coupled with advances in nanostructure technology. Therefore, this review focuses on the recent advances in LSPR-based biosensor technology for the detection of diverse chemicals and biomolecules. Moreover, we also provide recent examples of sensing strategies based on diverse nanostructure platforms, in addition to their advantages and limitations. Finally, this review discusses potential strategies for the development of biosensors with enhanced sensing performance.

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Tunable Fano resonances in heterogenous Al–Ag nanorod dimers

Cited by 21 publications

References 36 publications

Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer

Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer

Mid-infrared sensing properties of a plasmonic metal–insulator–metal waveguide with a single stub including defects

Biosensing Applications Using Nanostructure-Based Localized Surface Plasmon Resonance Sensors

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