Magnetoplasmonics in Au-Nanostructures

Joshi, Hira

doi:10.1016/j.matpr.2021.07.197

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…Qu et al [36] investigated Nonlinear absorptions associated with Au nanoparticles and found that sharp absorption was mainly due to SPR. Hira Joshi [37] studied the plasmonic effects of Au nanostructures in the presence of external magnetic field and found that the absorption increases with the increase in magnetic field strength.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear laser absorption on metal surface embedded with nanoparticles in the presence of external magnetic field

Simon

Chauhan

2023

Phys. Scr.

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A nonlinear analytical model is developed for the absorption of a p-polarized laser that is obliquely incident on a metal surface embedded with metallic nanoparticles under the influence of an external magnetic field. The model suggests that the absorption coefficient is proportional to the angle of incidence and cube of nanoparticle-radius, but inversely proportional to the square of interparticle separation. Obtained results show that the laser absorption by the nanoparticles is substantially amplified due to plasmon resonance in the presence of an external magnetic field. The absorption coefficient has a sharp peak at surface plasma resonance ω=ωp/3, where ωp is the plasma frequency and it shows explicit dependence on the amplitude transmission coefficient TA of the incident wave. Absorption coefficient is obtained for gold nanoparticles for different incident angles, radii and interparticle separations and this study is of direct relevance in high performance optoelectronic devices, solar cells and nanomedicines.

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Section: Introductionmentioning

confidence: 99%

Nonlinear laser absorption on metal surface embedded with nanoparticles in the presence of external magnetic field

Simon

Chauhan

2023

Phys. Scr.

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Anomalous absorption of p-polarised laser on metallic surface ingrained with noble-metal nanotubes in the presence of external magnetic field

Simon

Chauhan

2023

Opt Quant Electron

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Magnetic field enhanced laser absorption on a metallic surface incorporated with shape-dependent nanostructures

Simon,

Chauhan

2024

J. Phys. B: At. Mol. Opt. Phys.

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This communication proposes an analytical model that investigates the nanoparticle-based nonlinear absorption phenomenon associated with an obliquely incident p-polarized laser beam on a metallic surface. In this scheme, the surface is ingrained with noble-metal spherical nanoparticles (SNPs) and cylindrical nanoparticles (CNPs) in the presence of an external static magnetic field. The absorption of laser energy in the presence of nanoparticles (NPs) is attributed to surface plasmon resonance and enhanced magnetic-field effects. The absorption phenomenon was significantly enhanced by the incorporation of nanostructures and a magnetic field. The ellipticity characterizing parameter, which significantly influences resonant frequency of different nanometric structures have also been analysed and discussed. The effects of varying the magnetic field intensity, incident angle, size, and spacing of the NP were examined to determine their influence on the anomalous absorption of the laser. Furthermore, a direct dependency was found between the absorption coefficient and transmission coefficient of the incident laser, as well as the dimensions of the NPs. Several applications have direct relevance to this study, including biosensors such as DNA sensors and immunosensors, photothermal therapy, photoacoustic imaging, optoelectronic devices, solar cells, and surface-enhanced Raman spectroscopy.

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Magnetoplasmonics in Au-Nanostructures

Cited by 3 publications

References 20 publications

Nonlinear laser absorption on metal surface embedded with nanoparticles in the presence of external magnetic field

Nonlinear laser absorption on metal surface embedded with nanoparticles in the presence of external magnetic field

Anomalous absorption of p-polarised laser on metallic surface ingrained with noble-metal nanotubes in the presence of external magnetic field

Magnetic field enhanced laser absorption on a metallic surface incorporated with shape-dependent nanostructures

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