scholarly journals Localized Surface Plasmon Resonances with Spherical Metallic Nanoparticles

2018 ◽  
Vol 28 (2) ◽  
pp. 115 ◽  
Author(s):  
Minh Quang Ngo
Keyword(s):  
Surface Plasmon ◽  
Metallic Nanoparticles ◽  
Dielectric Medium ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Analytical Expressions ◽  
Theoretical Results ◽  
Electrical Intensity ◽  
Good Agreement

In this work we review in part of our recent theoretical study on the electrical intensity enhancement in the dielectric medium surrounding metallic nanoparticles due to the effect of their localized surface plasmon resonance (LSPR). The known results in the case of a simple metallic spherical nanoparticle are presented and then extend them to the general case of complex network of the identical spherical metallic nanoparticles. For illustration, several typical lattices of identical spherical metallic nanoparticles will be treated. The findings of electrical intensity enhancements and plasmonic resonance wavelengths of the single and the network of the metallic nanoparticles are obtained based on the analytical expressions. The theoretical results were compared and shown the good agreement with simulation results. The simulation of the LSPRs and the electrical intensity enhancements was performed using the boundary element method.

scholarly journals Exploiting Localized Surface Plasmon Resonances in Subwavelength Spiral Disks for THz Thin Film Sensing

2020 ◽  
Vol 10 (10) ◽  
pp. 3595
Author(s):  
Vasily V. Gerasimov ◽  
Ruslan R. Hafizov ◽  
Sergei A. Kuznetsov ◽  
Pavel A. Lazorskiy
Keyword(s):  
Surface Plasmon ◽  
Low Frequency ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Sensing Applications ◽  
Plasmon Resonances ◽  
High Figure ◽  
Sensing Performance ◽  
Good Agreement

In this paper, we studied the sensing performance of metasurfaces comprised by spiral-disk-shaped metallic elements patterned on polypropylene substrates, which exhibited localized surface plasmon resonances in the low-frequency region of the terahertz (THz) spectrum (0.2–0.5 THz). Optimal designs of spiral disks with C-shaped resonators placed near the disks were determined and fabricated. The experimentally measured transmittance spectra of the samples coated with very thin photoresistive layers (d ~ 10−4–10−3 λ) showed good agreement with the simulations. The resonance frequency shift Δf increases with increasing d, while saturating near d = 50 µm. The narrow-band magnetic dark modes excited on symmetrical spiral disks with a 90° C-resonator demonstrated very high figure of merit (FOM) values reaching 1670 (RIU·mm)−1 at 0.3 μm thick analyte. The hybrid high order resonances excited on asymmetrical densely packed spiral disks showed about two times larger FOM values (up to 2950 (RIU·mm)−1) compared to symmetrical distantly spaced spirals that resembled the best FOM results found in the literature for metasurfaces fabricated with a similar technique. The demonstrated high sensing performance of spiral disks is evaluated to be promising for bio-sensing applications in the THz range.

Tunable DUV Locolized Plasmonic Absorption by Al Metallic Nanoparticles Arrays

2014 ◽  
Vol 621 ◽  
pp. 65-70
Author(s):  
Chun Zi Wang ◽  
Kai Huang ◽  
Na Gao ◽  
Zhi Ming Wu ◽  
Jun Yong Kang
Keyword(s):  
Surface Plasmon ◽  
Metallic Nanoparticles ◽  
Extinction Spectrum ◽  
Blue Shift ◽  
Resonance Wavelength ◽  
Localized Surface Plasmon ◽  
Oblique Angle Deposition ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Al Nanoparticles

We dominated localized surface plasmon resonance (LSPR) of aluminum (Al) by controlling their size and density. We report the implementation of Al nanoparticles (NPs) fabricated on the surface of the Ta2O5layer on glass for localized surface plasmon resonances (LSPRs) coupling. The size, density controllable small Al NPs were fabricated using oblique angle deposition method. The optical properties of the NPs array were studied by UV spectrophotometer and finite-difference time-domain (FDTD) simulations. We found that the LSP resonance wavelength of different sizes of Al NPs array exists a blue shift in the extinction spectrum as the particle size decreases.

scholarly journals Exploiting Localized Surface Plasmon Resonances in Subwavelength Spiral Disks for THz Thin Film Sensing

2020 ◽  
Author(s):  
Vasily V. Gerasimov ◽  
Ruslan R. Hafizov ◽  
Sergei A. Kuznetsov ◽  
Pavel A. Lazorskiy
Keyword(s):  
Surface Plasmon ◽  
Low Frequency ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Sensing Applications ◽  
Plasmon Resonances ◽  
Very High ◽  
Sensing Performance ◽  
Good Agreement

In this paper, we study the sensing performance of metasurfaces comprised by spiral-disk-shaped metallic elements patterned on polypropylene substrates, which exhibit localized surface plasmon resonances in the low-frequency region of the THz spectrum (0.2-0.5 THz). Optimal designs of spiral disks with C-shaped resonators placed near the disks were determined and fabricated. The experimentally measured transmittance spectra of samples coated with very thin photoresistive layers (d ~ 10-4-10-3 λ) showed good agreement with simulations. The resonance frequency shift Δf increases with increasing d, while saturating near d = 50 µm. The narrow-band magnetic dark modes excited on symmetrical spiral disks with a 90⁰-C-resonator demonstrated very high FOM values reaching 1670 [RIU·mm]-1 at 0.3μm-thick analyte. The hybrid high order resonances excited on asymmetrical densely packed spiral disks showed about two times larger FOM values (up to 2950 [RIU·mm]-1) as compared to symmetrical distantly spaced spirals that resembles the best FOM results found in literature for metasurfaces fabricated with a similar technique. The demonstrated high sensing performance of spiral disks is evaluated to be promising for bio-sensing applications in the THz range.

scholarly journals Probing the symmetry of the potential of localized surface plasmon resonances with phase-shaped electron beams

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Giulio Guzzinati ◽  
Armand Béché ◽  
Hugo Lourenço-Martins ◽  
Jérôme Martin ◽  
Mathieu Kociak ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Electron Beams ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances
Sign in / Sign up

Export Citation Format

Share Document